Category: Earthquakes


KING 5.com

Earthquake Early Warning coming to Washington

by GLENN FARLEY KING5 News

Bio | Email | Follow: @GlennFarley

Posted on April 18, 2014 at 6:58 PM

Updated yesterday at 6:59 PM

 

SEATTLE –  It’s called “earthquake early warning” – a network of seismometers, computers and software  designed to work together to give people time to brace for earthquake shaking.

Scientists say think of it like lightning and thunder.  The further you are away from the lightening, the more seconds there are between seeing a flash and feeling the thunder.

If you’re sitting on top of the quake’s epicenter, there is no warning, but the warning will be longer the further you are from where the quake starts.

The University of Washington, Cal Tech, and the University of California at Berkeley have been working together for years bringing earthquake early warning to the West Coast.  Pieces of the system are starting to go into effect in the more active area of Southern California.

Washington faces a risk of bigger but less frequent mega-quakes off the coast that creates different requirements, but it should start seeing pieces of the system begin operating later this year, said state seismologist John Vidale, who also leads the Pacific Northwest Seismic Network based at the University of Washington.

“It’s about noticing earthquakes fast and telling people the shaking is on the way,” said Vidale.

 

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Earth Watch Report  -  Earthquakes

 photo Mexico-72magEQ4182014_zps80033ed4.png

6 earthquakes in map area  USGS

  1. M 3.1 – 14km WNW of Progreso, Mexico

     2014-04-18 12:44:32 UTC-05:00 9.7 km

  2. M 2.9 – 13km WNW of Progreso, Mexico

     2014-04-18 12:32:10 UTC-05:00 9.8 km

  3. M 4.3 – 94km SW of Tecpan de Galeana, Mexico

     2014-04-18 12:01:02 UTC-05:00 19.9 km

  4. M 7.2 – 36km NNW of Tecpan de Galeana, Mexico

     2014-04-18 09:27:26 UTC-05:00 24.0 km

  5. M 3.7 – 51km NNE of Camalu, Mexico

     2014-04-18 02:39:29 UTC-05:00 10.0 km

  6. M 3.0 – 33km ENE of Maneadero, Mexico

     2014-04-18 02:11:33 UTC-05:00 10.0 km

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Earthquake location 17.552°N, 100.816°W

 

Event Time

  1. 2014-04-18 14:27:26 UTC
  2. 2014-04-18 09:27:26 UTC-05:00 at epicenter
  3. 2014-04-18 09:27:26 UTC-05:00 system time

Location

17.552°N 100.816°W depth=24.0km (14.9mi)

Nearby Cities

  1. 36km (22mi) NNW of Tecpan de Galeana, Mexico
  2. 48km (30mi) E of Petatlan, Mexico
  3. 56km (35mi) NW of Atoyac de Alvarez, Mexico
  4. 78km (48mi) E of Zihuatanejo, Mexico
  5. 273km (170mi) SW of Mexico City, Mexico

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Tectonic Summary

The April 18, 2014 M 7.2 earthquake near the western coast of Mexico occurred in the state of Guerrero, 265 km southwest of Mexico City. The earthquake occurred as the result of thrust motion at shallow depths. The initial location, depth, and mechanism of the April 18 earthquake are broadly consistent with slip on or near the plate boundary interface between the subducting Cocos oceanic sea plate and the North America plate.
The broad scale tectonics of the west coast of Mexico are controlled by the northeastward subduction of the Cocos plate beneath the North America plate at a rate of approximately 65 mm/yr. Earthquakes are a common occurrence along the Middle American subduction zone; the April 2014 earthquake occurred just northwest of the rupture area of the 1957 M 7.8 Guerrero Earthquake.  Since 1975, 23 events of M > 6.0 have occurred within 200 km of the April 2014 earthquake, including events of M 8.0 and M 7.6 (September 1985), M 7.2 (October 1981), and M 7.5 (March 1979), all to the northwest. The 1981 and 1979 events caused 9 and 5 shaking-related fatalities, respectively. The 1985 M 8.0 earthquake, 195 km to the northwest of the April 2014 event, led to more than 9,500 fatalities, mostly in Mexico City, and generated small, local tsunamis. That event was influential in initiating efforts to establish earthquake early warning systems in Mexico City.
The April 2014 earthquake occurred within the “Guerrero Seismic Gap” – an approximately 200 km long segment of the Cocos-North America plate boundary identified to have experienced no significant earthquakes since 1911 (M 7.6). The plate interface in this region is known to be locked, with an earthquake of M 8.1-8.4 thought possible should the entire gap rupture in a single event.

 

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Instrumental Intensity

ShakeMap Intensity Image

 

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Magnitude-7.2 Earthquake Shakes Mexican Capital

VIDEO: The earthquake resulted in falling debris and panicked people in the streets.
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A powerful magnitude-7.2 earthquake shook central and southern Mexico on Friday, sending panicked people into the streets. Some walls cracked and fell, but there were no reports of major damage or casualties.

The U.S. Geological Survey said the quake at about 9:30 a.m. (10:30 a.m. EDT; 1430 GMT) was centered on a long-dormant fault line northwest of the Pacific resort of Acapulco, where many Mexicans are vacationing for the Easter holiday.

It was felt across at least a half-dozen states and Mexico’s capital, where it collapsed several walls and left large cracks in some facades. Debris covered sidewalks around the city.

Around the region, there were reports of isolated and minor damage, such as fallen fences, trees and broken windows. Chilpancingo, capital of the southern state of Guerrero, where the quake was centered, reported a power outage, but service was restored after 15 minutes.

In Acapulco, 59-year-old Enedina Ramirez Perez was having breakfast, enjoying the holiday with about 20 family members, when her hotel started to shake.

“People were turning over chairs in their desperation to get out, grabbing children, trampling people,” the Mexico City woman said. “The hotel security was excellent and started calming people down. They got everyone to leave quietly.”

The quake struck 170 miles (273 kilometers) southwest of Mexico City, where people fled high-rises and took to the streets, many in still in their bathrobes and pajamas on their day off.

“I started to hear the walls creak and I said, ‘Let’s go,’” said Rodolfo Duarte, 32, who fled his third-floor apartment.

Mexico City Mayor Miguel Angel Mancera said there were small power outages from fallen transformers but officials were working to restore the service.

The USGS initially calculated the quake’s magnitude at 7.5, but later downgraded it to 7.2. It said the quake was centered 22 miles (36 kilometers) northwest of the town of Tecpan de Galeana, and was 15 miles (24 kilometers) deep.

 

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Earth Watch Report  -  Earthquakes

Chile  -  187 EQ in the  last  30 days  4.14.2014 photo Chile-187EQinthelast30days4142014_zps5ec350d6.png
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Chile    30 Days, Magnitude 4.5+

187 earthquakes in map area

  1. 4.5 60km WSW of Arica, Chile 2014-04-14 17:20:35 UTC-05:00 33.4 km

  2. 4.7 91km WSW of Iquique, Chile 2014-04-14 08:35:41 UTC-05:00 10.0 km

  3. 5.3 83km SW of Iquique, Chile 2014-04-14 00:56:18 UTC-05:00 15.4 km

  4. 5.3 74km SW of Iquique, Chile 2014-04-13 07:11:30 UTC-05:00 18.6 km

  5. 4.6 148km SE of Iquique, Chile 2014-04-13 00:38:15 UTC-05:00 114.4 km

  6. 4.5 58km SSE of San Pedro de Atacama, Chile 2014-04-13 00:13:53 UTC-05:00 138.1 km

  7. 4.6 91km SW of Iquique, Chile 2014-04-11 18:56:36 UTC-05:00 8.4 km

  8. 5.5 45km WNW of Iquique, Chile 2014-04-11 07:00:51 UTC-05:00 22.3 km

  9. 4.9 86km WNW of Iquique, Chile 2014-04-11 03:55:55 UTC-05:00 13.2 km

  10. 4.9 86km WSW of Iquique, Chile 2014-04-11 03:39:45 UTC-05:00 27.6 km

  11. 6.0 84km SW of Iquique, Chile 2014-04-10 19:01:44 UTC-05:00 17.5 km

  12. 5.0 88km WNW of Iquique, Chile 2014-04-10 12:49:10 UTC-05:00 11.8 km

  13. 4.5 88km W of Iquique, Chile 2014-04-09 19:10:31 UTC-05:00 11.3 km

  14. 5.3 75km WSW of Iquique, Chile 2014-04-09 06:14:45 UTC-05:00 15.7 km

  15. 4.5 90km SW of Iquique, Chile 2014-04-09 06:06:15 UTC-05:00 15.6 km

  16. 4.9 79km WNW of Iquique, Chile 2014-04-08 23:32:58 UTC-05:00 15.8 km

  17. 5.7 87km WSW of Iquique, Chile 2014-04-08 05:14:32 UTC-05:00 7.0 km

  18. 4.5 78km WSW of Iquique, Chile 2014-04-08 02:55:22 UTC-05:00 15.1 km

  19. 5.2 61km WSW of Iquique, Chile 2014-04-08 00:43:56 UTC-05:00 17.1 km

  20. 5.0 65km WSW of Iquique, Chile 2014-04-08 00:40:47 UTC-05:00 16.2 km

  21. 5.0 82km WNW of Iquique, Chile 2014-04-08 00:20:21 UTC-05:00 17.3 km

  22. 4.6 65km NW of Iquique, Chile 2014-04-07 20:03:02 UTC-05:00 26.8 km

  23. 4.9 31km WNW of Iquique, Chile 2014-04-07 12:46:32 UTC-05:00 29.4 km

  24. 5.1 81km W of Iquique, Chile 2014-04-07 09:03:43 UTC-05:00 10.0 km

  25. 5.4 72km W of Iquique, Chile 2014-04-07 08:47:33 UTC-05:00 11.3 km

  26. 5.8 76km W of Iquique, Chile 2014-04-07 08:43:20 UTC-05:00 7.9 km

  27. 4.8 93km WSW of Iquique, Chile 2014-04-07 05:41:35 UTC-05:00 14.9 km

  28. 4.9 99km WSW of Iquique, Chile 2014-04-07 01:24:22 UTC-05:00 14.2 km

  29. 5.3 99km WSW of Iquique, Chile 2014-04-06 09:06:07 UTC-05:00 8.3 km

  30. 4.8 91km SW of Iquique, Chile 2014-04-06 04:06:51 UTC-05:00 15.7 km

  31. 4.6 79km SW of Iquique, Chile 2014-04-05 14:21:43 UTC-05:00 16.2 km

  32. 4.8 76km W of Iquique, Chile 2014-04-05 09:04:49 UTC-05:00 10.0 km

  33. 4.6 68km W of Iquique, Chile 2014-04-05 06:58:25 UTC-05:00 10.0 km

  34. 4.6 12km SE of Iquique, Chile 2014-04-05 03:16:32 UTC-05:00 49.8 km

  35. 4.7 77km WNW of Iquique, Chile 2014-04-05 02:54:19 UTC-05:00 12.5 km

  36. 4.6 15km WSW of Iquique, Chile 2014-04-05 02:01:28 UTC-05:00 36.0 km

  37. 4.8 81km W of Iquique, Chile 2014-04-05 01:32:09 UTC-05:00 9.9 km

  38. 5.3 33km WNW of Iquique, Chile 2014-04-05 00:44:55 UTC-05:00 19.0 km

  39. 4.7 73km SW of Iquique, Chile 2014-04-05 00:28:57 UTC-05:00 17.7 km

  40. 5.0 62km SW of Iquique, Chile 2014-04-04 23:08:58 UTC-05:00 32.5 km

  41. 4.8 83km SW of Iquique, Chile 2014-04-04 23:05:03 UTC-05:00 22.9 km

  42. 5.0 44km WNW of Iquique, Chile 2014-04-04 19:33:57 UTC-05:00 25.3 km

  43. 4.6 75km WNW of Iquique, Chile 2014-04-04 13:07:34 UTC-05:00 18.6 km

  44. 4.9 77km WSW of Iquique, Chile 2014-04-04 11:02:41 UTC-05:00 10.0 km

  45. 4.8 89km WNW of Iquique, Chile 2014-04-04 10:21:00 UTC-05:00 19.7 km

  46. 5.2 70km SW of Iquique, Chile 2014-04-04 04:53:26 UTC-05:00 17.6 km

  47. 5.1 91km WNW of Iquique, Chile 2014-04-04 04:38:55 UTC-05:00 13.1 km

  48. 4.6 84km WSW of Iquique, Chile 2014-04-04 02:10:28 UTC-05:00 17.9 km

  49. 4.5 88km WSW of Iquique, Chile 2014-04-04 01:06:31 UTC-05:00 22.2 km

  50. 4.7 15km SW of Tocopilla, Chile 2014-04-03 23:34:28 UTC-05:00 59.5 km

  51. 4.7 71km SW of Iquique, Chile 2014-04-03 22:18:38 UTC-05:00 18.6 km

  52. 6.1 76km SW of Iquique, Chile 2014-04-03 20:37:51 UTC-05:00 20.0 km

  53. 4.9 56km W of Iquique, Chile 2014-04-03 18:37:51 UTC-05:00 23.5 km

  54. 5.1 72km WSW of Iquique, Chile 2014-04-03 13:56:12 UTC-05:00 10.0 km

  55. 4.9 90km WSW of Iquique, Chile 2014-04-03 10:08:06 UTC-05:00 1.0 km

  56. 5.2 99km WSW of Iquique, Chile 2014-04-03 09:34:05 UTC-05:00 11.7 km

  57. 4.6 51km SSW of Iquique, Chile 2014-04-03 06:50:47 UTC-05:00 29.8 km

  58. 5.1 105km W of Iquique, Chile 2014-04-03 06:41:35 UTC-05:00 10.6 km

  59. 4.9 89km WSW of Iquique, Chile 2014-04-03 04:47:57 UTC-05:00 10.1 km

  60. 5.6 69km WSW of Iquique, Chile 2014-04-03 04:23:21 UTC-05:00 14.9 km

  61. 5.0 33km W of Iquique, Chile 2014-04-03 04:08:58 UTC-05:00 26.1 km

  62. 4.7 61km WSW of Iquique, Chile 2014-04-03 03:44:04 UTC-05:00 22.8 km

  63. 4.8 96km WNW of Iquique, Chile 2014-04-03 03:28:51 UTC-05:00 14.6 km

  64. 4.8 77km W of Iquique, Chile 2014-04-03 02:38:15 UTC-05:00 26.7 km

  65. 4.9 73km SW of Iquique, Chile 2014-04-03 01:54:31 UTC-05:00 17.8 km

  66. 4.9 91km SSE of Putre, Chile 2014-04-03 01:16:08 UTC-05:00 103.0 km

  67. 5.5 66km SSW of Iquique, Chile 2014-04-03 00:51:44 UTC-05:00 26.9 km

  68. 5.2 54km WSW of Iquique, Chile 2014-04-03 00:34:32 UTC-05:00 20.9 km

  69. 6.2 77km SSW of Iquique, Chile 2014-04-03 00:26:16 UTC-05:00 24.3 km

  70. 4.8 94km WNW of Iquique, Chile 2014-04-03 00:17:11 UTC-05:00 16.6 km

  71. 4.9 81km SW of Iquique, Chile 2014-04-02 23:53:37 UTC-05:00 10.0 km

  72. 5.2 82km WSW of Iquique, Chile 2014-04-02 23:17:57 UTC-05:00 18.2 km

  73. 4.5 50km WSW of Iquique, Chile 2014-04-02 23:04:45 UTC-05:00 20.0 km

  74. 5.1 77km WNW of Iquique, Chile 2014-04-02 22:45:55 UTC-05:00 21.3 km

  75. 4.9 79km SW of Iquique, Chile 2014-04-02 22:40:32 UTC-05:00 31.5 km

  76. 5.8 76km SW of Iquique, Chile 2014-04-02 22:11:14 UTC-05:00 10.0 km

  77. 5.6 71km SW of Iquique, Chile 2014-04-02 21:56:06 UTC-05:00 16.7 km

  78. 7.7 49km SW of Iquique, Chile 2014-04-02 21:43:14 UTC-05:00 31.1 km

  79. 4.9 86km W of Iquique, Chile 2014-04-02 21:41:14 UTC-05:00 14.7 km

  80. 6.5 43km W of Iquique, Chile 2014-04-02 20:58:31 UTC-05:00 22.8 km

  81. 5.1 120km WNW of Iquique, Chile 2014-04-02 19:01:16 UTC-05:00 19.0 km

  82. 4.8 51km WSW of Iquique, Chile 2014-04-02 16:23:50 UTC-05:00 22.8 km

  83. 4.6 90km WNW of Iquique, Chile 2014-04-02 15:42:49 UTC-05:00 17.6 km

  84. 4.6 154km WNW of Iquique, Chile 2014-04-02 15:34:38 UTC-05:00 13.5 km

  85. 5.1 45km WSW of Iquique, Chile 2014-04-02 14:45:50 UTC-05:00 24.2 km

  86. 4.5 87km WNW of Iquique, Chile 2014-04-02 13:56:53 UTC-05:00 13.0 km

  87. 4.9 52km NNW of Iquique, Chile 2014-04-02 12:12:31 UTC-05:00 36.2 km

  88. 4.5 82km NW of Iquique, Chile 2014-04-02 10:44:02 UTC-05:00 20.0 km

  89. 4.5 71km NW of Iquique, Chile 2014-04-02 08:00:58 UTC-05:00 22.7 km

  90. 5.1 85km WNW of Iquique, Chile 2014-04-02 06:11:35 UTC-05:00 16.5 km

  91. 5.4 92km WNW of Iquique, Chile 2014-04-02 06:07:30 UTC-05:00 10.0 km

  92. 5.0 75km W of Iquique, Chile 2014-04-02 03:25:50 UTC-05:00 10.0 km

  93. 5.1 27km WNW of Iquique, Chile 2014-04-02 02:03:40 UTC-05:00 10.0 km

  94. 5.2 77km W of Iquique, Chile 2014-04-02 01:29:15 UTC-05:00 10.0 km

  95. 5.1 70km NNW of Iquique, Chile 2014-04-02 01:04:10 UTC-05:00 10.0 km

  96. 5.0 93km WNW of Iquique, Chile 2014-04-02 00:51:00 UTC-05:00 10.0 km

  97. 4.7 55km WSW of Iquique, Chile 2014-04-02 00:09:19 UTC-05:00 10.0 km

  98. 5.0 115km WNW of Iquique, Chile 2014-04-02 00:02:49 UTC-05:00 10.0 km

  99. 5.8 74km W of Iquique, Chile 2014-04-01 23:46:18 UTC-05:00 10.0 km

  100. 5.1 93km WNW of Iquique, Chile 2014-04-01 23:19:48 UTC-05:00 10.0 km

  101. 4.9 82km WNW of Iquique, Chile 2014-04-01 23:16:10 UTC-05:00 10.0 km

  102. 4.9 88km NW of Iquique, Chile 2014-04-01 23:13:07 UTC-05:00 10.0 km

  103. 4.7 94km NNW of Iquique, Chile 2014-04-01 22:51:02 UTC-05:00 10.0 km

  104. 5.2 89km WNW of Iquique, Chile 2014-04-01 22:40:16 UTC-05:00 10.0 km

  105. 4.5 38km W of Iquique, Chile 2014-04-01 22:20:45 UTC-05:00 10.0 km

  106. 5.0 108km SSW of Arica, Chile 2014-04-01 21:52:25 UTC-05:00 10.0 km

  107. 4.9 100km WNW of Iquique, Chile 2014-04-01 21:32:47 UTC-05:00 10.0 km

  108. 4.8 113km SSW of Arica, Chile 2014-04-01 21:27:18 UTC-05:00 10.0 km

  109. 4.9 76km W of Iquique, Chile 2014-04-01 20:35:47 UTC-05:00 10.0 km

  110. 4.8 97km SSW of Arica, Chile 2014-04-01 20:33:56 UTC-05:00 10.0 km

  111. 5.2 75km WNW of Iquique, Chile 2014-04-01 20:29:41 UTC-05:00 10.0 km

  112. 4.7 64km WNW of Iquique, Chile 2014-04-01 20:22:55 UTC-05:00 10.0 km

  113. 5.3 111km NW of Iquique, Chile 2014-04-01 20:20:58 UTC-05:00 10.0 km

  114. 4.7 59km NW of Iquique, Chile 2014-04-01 19:57:50 UTC-05:00 32.8 km

  115. 5.4 46km WNW of Iquique, Chile 2014-04-01 19:37:49 UTC-05:00 21.5 km

  116. 5.5 56km W of Iquique, Chile 2014-04-01 19:33:45 UTC-05:00 12.6 km

  117. 5.6 70km WNW of Iquique, Chile 2014-04-01 19:24:45 UTC-05:00 10.0 km

  118. 5.7 95km NW of Iquique, Chile 2014-04-01 19:06:44 UTC-05:00 10.0 km

  119. 5.8 87km WNW of Iquique, Chile 2014-04-01 19:03:12 UTC-05:00 10.0 km

  120. 6.9 89km WNW of Iquique, Chile 2014-04-01 18:57:57 UTC-05:00 20.2 km

  121. 5.2 51km WNW of Iquique, Chile 2014-04-01 18:57:32 UTC-05:00 28.1 km

  122. 8.2 95km NW of Iquique, Chile 2014-04-01 18:46:46 UTC-05:00 20.1 km

  123. 4.5 63km NW of Iquique, Chile 2014-03-31 18:58:04 UTC-05:00 24.0 km

  124. 5.6 127km NE of Iquique, Chile 2014-03-31 07:53:05 UTC-05:00 112.1 km

  125. 4.5 96km S of San Pedro de Atacama, Chile 2014-03-30 20:28:17 UTC-05:00 179.0 km

  126. 4.6 93km WNW of Iquique, Chile 2014-03-29 21:44:45 UTC-05:00 14.2 km

  127. 4.9 90km NW of Iquique, Chile 2014-03-29 19:20:29 UTC-05:00 22.1 km

  128. 4.5 90km NW of Iquique, Chile 2014-03-28 19:07:16 UTC-05:00 23.9 km

  129. 4.8 99km NW of Iquique, Chile 2014-03-25 20:47:03 UTC-05:00 24.6 km

  130. 4.6 97km NW of Iquique, Chile 2014-03-25 01:31:23 UTC-05:00 19.9 km

  131. 4.6 111km NW of Iquique, Chile 2014-03-24 21:13:42 UTC-05:00 25.3 km

  132. 5.3 86km NW of Iquique, Chile 2014-03-24 19:15:14 UTC-05:00 21.6 km

  133. 4.7 98km NW of Iquique, Chile 2014-03-24 18:35:50 UTC-05:00 20.6 km

  134. 4.6 105km NW of Iquique, Chile 2014-03-24 14:59:43 UTC-05:00 18.8 km

  135. 5.0 82km NW of Iquique, Chile 2014-03-24 13:43:12 UTC-05:00 29.1 km

  136. 4.6 102km NW of Iquique, Chile 2014-03-24 13:19:27 UTC-05:00 19.9 km

  137. 4.7 100km NW of Iquique, Chile 2014-03-24 12:30:44 UTC-05:00 22.9 km

  138. 5.6 97km NW of Iquique, Chile 2014-03-24 10:45:31 UTC-05:00 17.9 km

  139. 5.0 34km NW of Taltal, Chile 2014-03-24 10:33:54 UTC-05:00 42.7 km

  140. 4.5 97km NW of Iquique, Chile 2014-03-24 10:11:44 UTC-05:00 26.4 km

  141. 4.9 85km NW of Iquique, Chile 2014-03-24 07:32:50 UTC-05:00 20.8 km

  142. 5.5 85km WNW of Iquique, Chile 2014-03-24 06:40:44 UTC-05:00 22.6 km

  143. 4.6 92km NW of Iquique, Chile 2014-03-24 06:35:37 UTC-05:00 36.3 km

  144. 5.1 84km NW of Iquique, Chile 2014-03-24 06:32:15 UTC-05:00 17.6 km

  145. 5.7 78km NW of Iquique, Chile 2014-03-24 06:26:39 UTC-05:00 22.0 km

  146. 4.9 75km NW of Iquique, Chile 2014-03-23 17:04:26 UTC-05:00 18.2 km

  147. 4.7 67km NW of Iquique, Chile 2014-03-23 16:17:27 UTC-05:00 21.7 km

  148. 5.3 89km WNW of Iquique, Chile 2014-03-23 15:23:03 UTC-05:00 23.4 km

  149. 4.7 77km NW of Iquique, Chile 2014-03-23 15:12:48 UTC-05:00 41.9 km

  150. 4.7 101km WNW of Iquique, Chile 2014-03-23 15:07:12 UTC-05:00 24.6 km

  151. 6.0 87km NW of Iquique, Chile 2014-03-23 13:20:03 UTC-05:00 34.6 km

  152. 4.5 115km WNW of Iquique, Chile 2014-03-23 11:45:14 UTC-05:00 20.7 km

  153. 5.1 108km WNW of Iquique, Chile 2014-03-22 17:14:56 UTC-05:00 10.0 km

  154. 5.0 89km WNW of Iquique, Chile 2014-03-22 09:15:38 UTC-05:00 22.6 km

  155. 4.6 84km WNW of Iquique, Chile 2014-03-22 08:44:14 UTC-05:00 39.7 km

  156. 5.5 100km WNW of Iquique, Chile 2014-03-22 08:29:57 UTC-05:00 10.0 km

  157. 4.6 87km WNW of Iquique, Chile 2014-03-22 08:22:47 UTC-05:00 15.9 km

  158. 5.1 96km NW of Iquique, Chile 2014-03-22 08:14:58 UTC-05:00 24.0 km

  159. 6.2 91km WNW of Iquique, Chile 2014-03-22 07:59:59 UTC-05:00 20.0 km

  160. 4.6 12km NNW of Putre, Chile 2014-03-22 00:56:06 UTC-05:00 124.1 km

  161. 5.4 144km SSW of San Pedro de Atacama, Chile 2014-03-20 13:41:31 UTC-05:00 89.9 km

  162. 5.0 76km WNW of Iquique, Chile 2014-03-18 16:33:06 UTC-05:00 10.0 km

  163. 5.9 73km WNW of Iquique, Chile 2014-03-18 16:26:47 UTC-05:00 10.0 km

  164. 4.6 102km WNW of Iquique, Chile 2014-03-18 10:26:29 UTC-05:00 18.7 km

  165. 5.0 73km W of Iquique, Chile 2014-03-18 09:35:56 UTC-05:00 14.0 km

  166. 4.9 73km W of Iquique, Chile 2014-03-18 09:18:34 UTC-05:00 9.0 km

  167. 5.1 97km WNW of Iquique, Chile 2014-03-18 08:35:28 UTC-05:00 18.4 km

  168. 5.0 59km WNW of Iquique, Chile 2014-03-18 04:30:28 UTC-05:00 21.2 km

  169. 4.5 96km WNW of Iquique, Chile 2014-03-17 15:10:27 UTC-05:00 10.9 km

  170. 5.3 59km WNW of Iquique, Chile 2014-03-17 14:05:30 UTC-05:00 32.2 km

  171. 4.5 88km WNW of Iquique, Chile 2014-03-17 08:35:10 UTC-05:00 13.4 km

  172. 4.9 86km WNW of Iquique, Chile 2014-03-17 06:12:17 UTC-05:00 35.5 km

  173. 4.5 67km WNW of Iquique, Chile 2014-03-17 04:12:59 UTC-05:00 15.9 km

  174. 4.9 74km WNW of Iquique, Chile 2014-03-17 03:51:05 UTC-05:00 16.4 km

  175. 5.3 55km WNW of Iquique, Chile 2014-03-17 03:32:36 UTC-05:00 12.4 km

  176. 4.6 77km WNW of Iquique, Chile 2014-03-17 02:54:58 UTC-05:00 14.4 km

  177. 5.0 82km WNW of Iquique, Chile 2014-03-17 00:19:34 UTC-05:00 12.0 km

  178. 6.2 80km WNW of Iquique, Chile 2014-03-17 00:11:34 UTC-05:00 17.0 km

  179. 4.6 65km WNW of Iquique, Chile 2014-03-16 22:28:21 UTC-05:00 10.0 km

  180. 4.7 130km NW of Iquique, Chile 2014-03-16 21:41:50 UTC-05:00 11.2 km

  181. 4.6 88km WNW of Iquique, Chile 2014-03-16 21:05:58 UTC-05:00 23.6 km

  182. 5.2 70km WNW of Iquique, Chile 2014-03-16 20:34:55 UTC-05:00 10.0 km

  183. 4.5 61km W of Iquique, Chile 2014-03-16 18:08:12 UTC-05:00 10.0 km

  184. 4.9 68km SE of Arica, Chile 2014-03-16 17:54:09 UTC-05:00 11.9 km

  185. 4.9 84km WNW of Iquique, Chile 2014-03-16 17:29:35 UTC-05:00 10.9 km

  186. 5.1 63km WNW of Iquique, Chile 2014-03-16 16:26:25 UTC-05:00 21.7 km

  187. 6.7 60km WNW of Iquique, Chile 2014-03-16 16:16:30 UTC-05:00 20.0 km

 

…..

 

M8.0 – NEAR THE COAST OF TARAPACA, CHILE

Preliminary Earthquake Report
Magnitude 8.0
Date-Time
  • 1 Apr 2014 23:46:45 UTC
  • 1 Apr 2014 18:46:45 near epicenter
  • 1 Apr 2014 17:46:45 standard time in your timezone
Location 19.630S 70.863W
Depth 10 km
Distances
  • 99 km (61 mi) NW of Iquique, Chile
  • 140 km (86 mi) SSW of Arica, Chile
  • 191 km (118 mi) SSW of Tacna, Peru
  • 225 km (139 mi) SSE of Ilo, Peru
  • 449 km (278 mi) SW of La Paz, Bolivia
Location Uncertainty Horizontal: 0.0 km; Vertical 1.8 km
Parameters Nph = 78; Dmin = 78.0 km; Rmss = 1.40 seconds; Gp = 60°
Version = 1
Event ID us c000nzvd

For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey
http://earthquake.usgs.gov/regional/neic/

 

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Globe with Earthquake Location

M6.2 – NEAR THE COAST OF TARAPACA, CHILE

Preliminary Earthquake Report
Magnitude 6.2
Date-Time
  • 1 Apr 2014 23:58:00 UTC
  • 1 Apr 2014 20:58:01 near epicenter
  • 1 Apr 2014 17:58:00 standard time in your timezone
Location 19.425S 70.264W
Depth 18 km
Distances
  • 88 km (54 mi) N of Iquique, Chile
  • 105 km (65 mi) S of Arica, Chile
  • 157 km (97 mi) S of Tacna, Peru
  • 227 km (140 mi) SSE of Ilo, Peru
  • 393 km (243 mi) SW of La Paz, Bolivia
Location Uncertainty Horizontal: 0.0 km; Vertical 3.5 km
Parameters Nph = 65; Dmin = 77.7 km; Rmss = 1.03 seconds; Gp = 83°
Version =
Event ID us c000nzwm

For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey
http://earthquake.usgs.gov/regional/neic/

 

…..

Globe with Earthquake Location

M7.8 – TARAPACA, CHILE

Preliminary Earthquake Report
Magnitude 7.8
Date-Time
  • 3 Apr 2014 02:43:15 UTC
  • 2 Apr 2014 23:43:16 near epicenter
  • 2 Apr 2014 20:43:15 standard time in your timezone
Location 20.430S 70.113W
Depth 20 km
Distances
  • 23 km (14 mi) S of Iquique, Chile
  • 184 km (114 mi) N of Tocopilla, Chile
  • 217 km (134 mi) S of Arica, Chile
  • 256 km (158 mi) NNW of Calama, Chile
  • 481 km (298 mi) SSW of La Paz, Bolivia
Location Uncertainty Horizontal: 0.0 km; Vertical 1.8 km
Parameters Nph = 64; Dmin = 88.4 km; Rmss = 1.42 seconds; Gp = 67°
Version = 1
Event ID us c000p27i

For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey
http://earthquake.usgs.gov/regional/neic/

 

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Globe with Earthquake Location

M6.1 – NEAR THE COAST OF TARAPACA, CHILE

Preliminary Earthquake Report
Magnitude 6.1
Date-Time
  • 4 Apr 2014 01:37:51 UTC
  • 3 Apr 2014 20:37:51 near epicenter
  • 3 Apr 2014 19:37:51 standard time in your timezone
Location 20.621S 70.739W
Depth 20 km
Distances
  • 76 km (47 mi) SW of Iquique, Chile
  • 172 km (106 mi) NNW of Tocopilla, Chile
  • 241 km (149 mi) S of Arica, Chile
  • 277 km (171 mi) NW of Calama, Chile
  • 531 km (329 mi) SSW of La Paz, Bolivia
Location Uncertainty Horizontal: 0.0 km; Vertical 1.8 km
Parameters Nph = 88; Dmin = 130.7 km; Rmss = 1.10 seconds; Gp = 91°
Version =
Event ID us c000p4a9

For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey
http://earthquake.usgs.gov/regional/neic/

 

…..

 

Globe with Earthquake Location

M6.0 – NEAR THE COAST OF TARAPACA, CHILE

Preliminary Earthquake Report
Magnitude 6.0
Date-Time
  • 11 Apr 2014 00:01:44 UTC
  • 10 Apr 2014 19:01:44 near epicenter
  • 10 Apr 2014 18:01:44 standard time in your timezone
Location 20.748S 70.724W
Depth 17 km
Distances
  • 84 km (52 mi) SW of Iquique, Chile
  • 158 km (97 mi) NNW of Tocopilla, Chile
  • 255 km (158 mi) S of Arica, Chile
  • 265 km (164 mi) NW of Calama, Chile
  • 542 km (336 mi) SSW of La Paz, Bolivia
Location Uncertainty Horizontal: 0.0 km; Vertical 3.9 km
Parameters Nph = 52; Dmin = 60.3 km; Rmss = 1.32 seconds; Gp = 139°
Version =
Event ID us c000pfgr

For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey
http://earthquake.usgs.gov/regional/neic/

 

…..

SacBee.com

 

7.6 aftershock rattles Chile’s far-northern coast

CORRECTION Chile Earthquake
Fishing boats washed ashore by a small tsunami sit in Caleta Riquelme, adjacent to the port, in the northern town of Iquique Chile, after magnitude 8.2 earthquake struck the northern coast of Chile, Wednesday, April 2, 2014. Authorities lifted tsunami warnings for Chile’s long coastline early Wednesday. Six people were crushed to death or suffered fatal heart attacks, a remarkably low toll for such a powerful shift in the Earth’s crust.
Cristian Viveros | AP

 

 

Published: Tuesday, Apr. 1, 2014 – 11:30 pm

Last Modified: Wednesday, Apr. 2, 2014 – 10:44 pm

A powerful 7.6-magnitude aftershock hit Chile’s far-northern coast late Wednesday night, shaking the same area where a magnitude-8.2 earthquake hit just a day before causing some damage and six deaths.

Chile’s Emergency Office and navy issued a tsunami alert and ordered a precautionary evacuation of low-lying areas on the northern coast, meaning many people could be spending another sleepless night away from their homes.

The aftershock caused buildings to shake and people to run out into the streets in the port of Iquique, which was one of the cities that saw some damage from Tuesday night’s big quake. But there were no immediate reports of new damage or injuries from the latest tremor, which was one of dozens that have followed the 8.2 quake.

 

Chile Earthquake
A fire burns at a restaurant after an earthquake in Iquique, Chile, Tuesday, April 1, 2014. A powerful magnitude-8.2 earthquake struck off Chile’s northern coast Tuesday night. There were no immediate reports of injuries or major damage, but buildings shook in nearby Peru and in Bolivia’s high altitude capital of La Paz.
Cristian Vivero Boornes | AP

“I was evacuated like all citizens. One can see that the people are prepared,” tweeted President Michelle Bachelet, who was in the nearby city of Arica to assess the damage.

The aftershock was centered 12 miles (19 kilometers) south of Iquique at a depth of 25 miles (40 kilometers), the U.S Geological Survey said. The USGS initially reported the tremor’s magnitude at 7.8, but downgraded it to 7.6.

 

Read More He

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Earth Watch Report  -  Earthquakes

Chile - 147 EQs in the  last 7 days .  4.5.2014 photo Chile147EQinthelast7days452014_zpsef523ec4.png

98 earthquakes in map area

  1. M 4.8 – 76km W of Iquique, Chile

     2014-04-05 09:04:49 UTC-05:00 10.0 km

  2. M 4.6 – 68km W of Iquique, Chile

     2014-04-05 06:58:25 UTC-05:00 10.0 km

  3. M 4.6 – 12km SE of Iquique, Chile

     2014-04-05 03:16:32 UTC-05:00 49.8 km

  4. M 4.7 – 77km WNW of Iquique, Chile

     2014-04-05 02:54:19 UTC-05:00 12.5 km

  5. M 4.6 – 15km WSW of Iquique, Chile

     2014-04-05 02:01:28 UTC-05:00 36.0 km

  6. M 4.8 – 81km W of Iquique, Chile

     2014-04-05 01:32:09 UTC-05:00 9.9 km

  7. M 5.3 – 33km WNW of Iquique, Chile

     2014-04-05 00:44:55 UTC-05:00 19.0 km

  8. M 4.7 – 73km SW of Iquique, Chile

     2014-04-05 00:28:57 UTC-05:00 17.7 km

  9. M 5.0 – 62km SW of Iquique, Chile

     2014-04-04 23:08:58 UTC-05:00 32.5 km

  10. M 4.8 – 83km SW of Iquique, Chile

     2014-04-04 23:05:03 UTC-05:00 22.9 km

  11. M 5.4 – 17km WNW of Hacienda La Calera, Chile

     2014-04-04 21:22:38 UTC-05:00 32.2 km

  12. M 5.0 – 44km WNW of Iquique, Chile

     2014-04-04 19:33:57 UTC-05:00 25.3 km

  13. M 4.6 – 75km WNW of Iquique, Chile

     2014-04-04 13:07:34 UTC-05:00 18.6 km

  14. M 4.9 – 77km WSW of Iquique, Chile

     2014-04-04 11:02:41 UTC-05:00 10.0 km

  15. M 4.8 – 89km WNW of Iquique, Chile

     2014-04-04 10:21:00 UTC-05:00 19.7 km

  16. M 5.2 – 70km SW of Iquique, Chile

     2014-04-04 04:53:26 UTC-05:00 17.6 km

  17. M 5.4 – 65km ENE of Salamanca, Chile

     2014-04-04 04:52:08 UTC-05:00 94.5 km

  18. M 5.1 – 91km WNW of Iquique, Chile

     2014-04-04 04:38:55 UTC-05:00 13.1 km

  19. M 4.7 – West Chile Rise

     2014-04-04 03:53:56 UTC-05:00 10.0 km

  20. M 4.6 – 84km WSW of Iquique, Chile

     2014-04-04 02:10:28 UTC-05:00 17.9 km

  21. M 4.5 – 88km WSW of Iquique, Chile

     2014-04-04 01:06:31 UTC-05:00 22.2 km

  22. M 4.7 – 15km SW of Tocopilla, Chile

     2014-04-03 23:34:28 UTC-05:00 59.5 km

  23. M 4.7 – 71km SW of Iquique, Chile

     2014-04-03 22:18:38 UTC-05:00 18.6 km

  24. M 6.1 – 76km SW of Iquique, Chile

     2014-04-03 20:37:51 UTC-05:00 20.0 km

  25. M 4.9 – 56km W of Iquique, Chile

     2014-04-03 18:37:51 UTC-05:00 23.5 km

  26. M 5.1 – 72km WSW of Iquique, Chile

     2014-04-03 13:56:12 UTC-05:00 10.0 km

  27. M 4.9 – 90km WSW of Iquique, Chile

     2014-04-03 10:08:06 UTC-05:00 1.0 km

  28. M 5.2 – 99km WSW of Iquique, Chile

     2014-04-03 09:34:05 UTC-05:00 11.7 km

  29. M 4.6 – 51km SSW of Iquique, Chile

     2014-04-03 06:50:47 UTC-05:00 29.8 km

  30. M 5.1 – 105km W of Iquique, Chile

     2014-04-03 06:41:35 UTC-05:00 10.6 km

  31. M 4.9 – 89km WSW of Iquique, Chile

     2014-04-03 04:47:57 UTC-05:00 10.1 km

  32. M 5.6 – 69km WSW of Iquique, Chile

     2014-04-03 04:23:21 UTC-05:00 14.9 km

  33. M 5.0 – 33km W of Iquique, Chile

     2014-04-03 04:08:58 UTC-05:00 26.1 km

  34. M 4.7 – 61km WSW of Iquique, Chile

     2014-04-03 03:44:04 UTC-05:00 22.8 km

  35. M 4.8 – 96km WNW of Iquique, Chile

     2014-04-03 03:28:51 UTC-05:00 14.6 km

  36. 4.8 77km W of Iquique, Chile 2014-04-03 02:38:15 UTC-05:00 26.7 km

  37. 4.9 73km SW of Iquique, Chile 2014-04-03 01:54:31 UTC-05:00 17.8 km

  38. 4.9 91km SSE of Putre, Chile 2014-04-03 01:16:08 UTC-05:00 103.0 km

  39. 5.5 66km SSW of Iquique, Chile 2014-04-03 00:51:44 UTC-05:00 26.9 km

  40. 5.2 54km WSW of Iquique, Chile 2014-04-03 00:34:32 UTC-05:00 20.9 km

  41. 6.2 77km SSW of Iquique, Chile 2014-04-03 00:26:16 UTC-05:00 24.3 km

  42. 4.8 94km WNW of Iquique, Chile 2014-04-03 00:17:11 UTC-05:00 16.6 km

  43. 4.9 81km SW of Iquique, Chile 2014-04-02 23:53:37 UTC-05:00 10.0 km

  44. 5.2 82km WSW of Iquique, Chile 2014-04-02 23:17:57 UTC-05:00 18.2 km

  45. 4.5 50km WSW of Iquique, Chile 2014-04-02 23:04:45 UTC-05:00 20.0 km

  46. 5.1 77km WNW of Iquique, Chile 2014-04-02 22:45:55 UTC-05:00 21.3 km

  47. 4.9 79km SW of Iquique, Chile 2014-04-02 22:40:32 UTC-05:00 31.5 km

  48. 5.8 76km SW of Iquique, Chile 2014-04-02 22:11:14 UTC-05:00 10.0 km

  49. 5.6 71km SW of Iquique, Chile 2014-04-02 21:56:06 UTC-05:00 16.7 km

  50. 7.7 49km SW of Iquique, Chile 2014-04-02 21:43:14 UTC-05:00 31.1 km

  51. 4.9 86km W of Iquique, Chile 2014-04-02 21:41:14 UTC-05:00 14.7 km

  52. 6.5 43km W of Iquique, Chile 2014-04-02 20:58:31 UTC-05:00 22.8 km

  53. 5.1 120km WNW of Iquique, Chile 2014-04-02 19:01:16 UTC-05:00 19.0 km

  54. 4.8 51km WSW of Iquique, Chile 2014-04-02 16:23:50 UTC-05:00 22.8 km

  55. 4.6 90km WNW of Iquique, Chile 2014-04-02 15:42:49 UTC-05:00 17.6 km

  56. 4.6 154km WNW of Iquique, Chile 2014-04-02 15:34:38 UTC-05:00 13.5 km

  57. 5.1 45km WSW of Iquique, Chile 2014-04-02 14:45:50 UTC-05:00 24.2 km

  58. 4.5 87km WNW of Iquique, Chile 2014-04-02 13:56:53 UTC-05:00 13.0 km

  59. 4.9 52km NNW of Iquique, Chile 2014-04-02 12:12:31 UTC-05:00 36.2 km

  60. 4.5 82km NW of Iquique, Chile 2014-04-02 10:44:02 UTC-05:00 20.0 km

  61. 4.5 71km NW of Iquique, Chile 2014-04-02 08:00:58 UTC-05:00 22.7 km

  62. 5.1 85km WNW of Iquique, Chile 2014-04-02 06:11:35 UTC-05:00 16.5 km

  63. 5.4 92km WNW of Iquique, Chile 2014-04-02 06:07:30 UTC-05:00 10.0 km

  64. 5.0 75km W of Iquique, Chile 2014-04-02 03:25:50 UTC-05:00 10.0 km

  65. 5.1 27km WNW of Iquique, Chile 2014-04-02 02:03:40 UTC-05:00 10.0 km

  66. 5.2 77km W of Iquique, Chile 2014-04-02 01:29:15 UTC-05:00 10.0 km

  67. 5.1 70km NNW of Iquique, Chile 2014-04-02 01:04:10 UTC-05:00 10.0 km

  68. 5.0 93km WNW of Iquique, Chile 2014-04-02 00:51:00 UTC-05:00 10.0 km

  69. 4.7 55km WSW of Iquique, Chile 2014-04-02 00:09:19 UTC-05:00 10.0 km

  70. 5.0 115km WNW of Iquique, Chile 2014-04-02 00:02:49 UTC-05:00 10.0 km

  71. 5.8 74km W of Iquique, Chile 2014-04-01 23:46:18 UTC-05:00 10.0 km

  72. 5.1 93km WNW of Iquique, Chile 2014-04-01 23:19:48 UTC-05:00 10.0 km

  73. 4.9 82km WNW of Iquique, Chile 2014-04-01 23:16:10 UTC-05:00 10.0 km

  74. 4.9 88km NW of Iquique, Chile 2014-04-01 23:13:07 UTC-05:00 10.0 km

  75. 4.7 94km NNW of Iquique, Chile 2014-04-01 22:51:02 UTC-05:00 10.0 km

  76. 5.2 89km WNW of Iquique, Chile 2014-04-01 22:40:16 UTC-05:00 10.0 km

  77. 4.5 38km W of Iquique, Chile 2014-04-01 22:20:45 UTC-05:00 10.0 km

  78. 5.0 108km SSW of Arica, Chile 2014-04-01 21:52:25 UTC-05:00 10.0 km

  79. 4.9 100km WNW of Iquique, Chile 2014-04-01 21:32:47 UTC-05:00 10.0 km

  80. 4.8 113km SSW of Arica, Chile 2014-04-01 21:27:18 UTC-05:00 10.0 km

  81. 4.9 76km W of Iquique, Chile 2014-04-01 20:35:47 UTC-05:00 10.0 km

  82. 4.8 97km SSW of Arica, Chile 2014-04-01 20:33:56 UTC-05:00 10.0 km

  83. 5.2 75km WNW of Iquique, Chile 2014-04-01 20:29:41 UTC-05:00 10.0 km

  84. 4.7 64km WNW of Iquique, Chile 2014-04-01 20:22:55 UTC-05:00 10.0 km

  85. 5.3 111km NW of Iquique, Chile 2014-04-01 20:20:58 UTC-05:00 10.0 km

  86. 4.7 59km NW of Iquique, Chile 2014-04-01 19:57:50 UTC-05:00 32.8 km

  87. 5.4 46km WNW of Iquique, Chile 2014-04-01 19:37:49 UTC-05:00 21.5 km

  88. 5.5 56km W of Iquique, Chile 2014-04-01 19:33:45 UTC-05:00 12.6 km

  89. 5.6 70km WNW of Iquique, Chile 2014-04-01 19:24:45 UTC-05:00 10.0 km

  90. 5.7 95km NW of Iquique, Chile 2014-04-01 19:06:44 UTC-05:00 10.0 km

  91. 5.8 87km WNW of Iquique, Chile 2014-04-01 19:03:12 UTC-05:00 10.0 km

  92. 6.2 88km N of Iquique, Chile 2014-04-01 18:58:00 UTC-05:00 18.1 km

  93. 5.2 51km WNW of Iquique, Chile 2014-04-01 18:57:32 UTC-05:00 28.1 km

  94. 5.2 93km NW of Iquique, Chile 2014-04-01 18:56:47 UTC-05:00 10.0 km

  95. 8.2 95km NW of Iquique, Chile 2014-04-01 18:46:46 UTC-05:00 20.1 km

  96. 4.5 63km NW of Iquique, Chile 2014-03-31 18:58:04 UTC-05:00 24.0 km

  97. 5.6 127km NE of Iquique, Chile 2014-03-31 07:53:05 UTC-05:00 112.1 km

  98. 4.6 West Chile Rise 2014-03-30 01:02:38 UTC-05:00 10.0 km

…..

M 8.2 – 95km NW of Iquique, Chile

Instrumental Intensity

ShakeMap Intensity Image

 

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M 7.7 – 49km SW of Iquique, Chile

 

Instrumental Intensity

ShakeMap Intensity Image

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M 6.5 – 43km W of Iquique, Chile

 

Instrumental Intensity

ShakeMap Intensity Image

…..

 

New earthquake in Chile prompts tsunami alerts

SANTIAGO Thu Apr 3, 2014 12:36am EDT

(Reuters) – A powerful 7.6-magnitude earthquake struck off northern Chile late on Wednesday, prompting tsunami alerts and evacuations along the coast and in neighboring Peru.

It was the strongest of several aftershocks that followed a huge 8.2-magnitude quake blamed for six deaths in the region on Tuesday.

There were no initial reports of serious damage but President Michelle Bachelet, who had gone to the area to inspect the damage from the earlier quake, was evacuated from her hotel in the city of Arica, local media reported.

 

Read More Here

 

 

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Deadly 8.2 Earthquake Displaces Thousands in Chile

 

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By Reuters

Earthquakes rattled residents in Oklahoma on Saturday, the latest in a series that have put the state on track for record quake activity this year, which some seismologists say may be tied to oil and gas exploration.

One earthquake recorded at 3.8 magnitude by the U.S. Geological Survey rocked houses in several communities around central Oklahoma at 7:42 a.m. local time.

Another about two hours earlier in the same part of the state, north of Oklahoma City, was recorded at 2.9 magnitude, USGS said.

Root issue: Seismologists believe the quakes may be tied to oil and gas exploration

Root issue: Seismologists believe the quakes may be tied to oil and gas exploration

 

Those two were preceded by two more, at 2.6 magnitude, and 2.5 magnitude, that also rolled the landscape in central Oklahoma early Saturday morning.

A 3.0 magnitude tremor struck late Friday night in that area as well, following a 3.4 magnitude hit Friday afternoon.

The quakes have set record levels of seismic activity through the state

The quakes have set record levels of seismic activity through the state

 

Austin Holland, a seismologist with the Oklahoma Geological Survey who tracks earthquake activity for the USGS, said the earthquake activity in the state is soaring.

‘We have had almost as many magnitude 3 and greater already in 2014 than we did for all of 2013,’ Holland said.

 

Last year’s number of ‘felt’ earthquakes – those strong enough to rattle items on a shelf – hit a record 222 in the state. This year, less than four months into the year, the state has recorded 253 such tremors, according to state seismic data.

 

Read More Here

 

 

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Chile earthquake sparks tsunami warning and evacuation of thousands

Deaths reported and people on coast spending night in the hills after magnitude 8.2 undersea quake triggers emergency

Evacuation under way in Antofagasta, Chile, after an offshore earthquake triggered a tsunami alert and full-scale civil emergency.
Evacuation under way in Antofagasta, Chile, after an offshore earthquake triggered a tsunami alert. Photograph: Javiera Mora Araya/EPA

An earthquake of magnitude 8.2 has jolted northern Chile, triggering a tsunami alert and the evacuation of thousands of people from coastal areas. At least five people were killed and more than 300 women escaped from a coastal prison.

The quake was centred under the Pacific Ocean 61 miles north-west of the city of Iquique and struck at 8.46pm as thousands of residents were arriving home from work.

As sirens blared and emergency warnings urged residents to evacuate by foot to higher ground, in coastal cities traffic jams ensued as panicked residents sought to escape the coast. The first tsunami surge measured 2.5 metres (8.2ft) and flooded low-lying areas of Iquique including a medical clinic and bus terminal.

Chile shakemap
An image released by the US Geological Survey shows the location of a magnitude 8.0 earthquake off the coast of Chile 100km from the city of Iquique. Photograph: USGS/EPA

While thousands of residents sought refuge in the hills, an ad-hoc security force of police and members of the Chilean armed forces searched Iquique for the estimated 329 female prisoners thought to have escaped. Initial reports from Chilean investigative police said 16 prisoners had been apprehended. Firefighters, meanwhile, battled a huge blaze in central Iquique and the lack of water and electricity added to a sense of chaos.

In Santiago, a contingent of special forces police boarded a Hercules transport plane and were flown north to provide reinforcements and help prevent looting. In Iquique, police took control of service stations and provided perimeter security for supermarkets. Government officials said attempts to loot stores and abandoned homes in Iquique were rebuffed by police.

 

Read More Here

 

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Earthquake Off Chile’s Coast, Tsunami Warnings Issued

 

Published on Apr 2, 2014

More than 900,000 people evacuate Chile’s coastal areas after 8.2-magnitude quake.

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Chile earthquake: five dead as tsunami warning triggers coastal evacuation – live updates

  • Earthquake triggers tsunami warnings, mass evacuations
  • Five people are reported to have died in the aftermath
  • Authorities have called for ‘preventative evacuation’
Chile shakemap
A map by the US Geological Survey shows the location of a magnitude 8.2 earthquake off the coast of Chile, some 100km from the city of Iquique. Image: USGS/EPA

5.40pm AEST

Closing summary

We’re going to wrap up our live coverage of the earthquake and aftermath in Chile for the moment. Here’s a summary of how events unfolded today:

An 8.2 magnitude earthquake struck 60 kilometres northwest of the city of Iquique on Tuesday evening in Chile at 8:46pm, killing at least five people and allowing 300 prisoners to escape a nearby prison. Tremors have continued following the initial quake, and there have been more than 20 aftershocks in the region according to the United States Geological Survey.

A tsunami alert was issued for the Chilean coast and a precautionary evacuation was ordered. The tsunami warning has since been cancelled for Peru and Chile, although an advisory remains in place for Hawaii.

There are reports of some flooding in the streets of coastal areas but no damage from tsunami waves. The Chilean president has ordered a state of emergency for Arica, Parinacota and Tarapacá.

Updated at 5.44pm AEST

5.20pm AEST

My colleague Jonathan Franklin has just filed this update on events in Chile:

An 8.2 earthquake jolted Northern Chile killing at least 5 people and permitting more than 300 female inmates to escape a coastal prison. The quake, some 60 kilometres northwest of the city of Iquique, hit at 8:46pm as thousands of residents were arriving home from work.

As air raid sirens blared and emergency warnings urged residents to evacuate by foot to higher ground, in several coastal cities traffic jams ensued as panicked residents sought to escape the coast. The first tsunami surge measured 2.5 meters (8.2 feet) and flooded low lying areas of Iquique including a medical clinic and a bus terminal.

While thousands of residents sought refuge in the hills, an ad-hoc security force of police and members of the Chilean Armed Forces searched Iquique for the estimated 329 female prisoners thought to have escaped in the aftermath of the earthquake. Initial reports by Chilean investigative police PDI reported some 16 prisoners had been apprehended. Firefighters meanwhile battled a huge blaze in central Iquique and the lack of water and electricity added to a sense of chaos.

More to follow soon.

Updated at 5.41pm AEST

5.10pm AEST

The Pacific Tsunami Warning Center has indicated in their latest release that a major Tsunami is not expected to strike Hawaii – but it should be stressed the tsunami advisory is still in place:

Based on all available data a major tsunami is not expected to strike the state of Hawaii. However…sea level changes and strong currents may occur along all coasts that could be a hazard to swimmers and boaters as well as to persons near the shore at beaches and in harbours and marinas. The threat may continue for several hours after the initial wave arrival.

Updated at 5.13pm AEST

5.06pm AEST

The latest update from the United States Geological Survey indicates there have been at least 25 after shocks following the initial 8.2 magnitude quake. The subsequent shocks range from 4.7 to 6.2 magnitude and are scattered in the same region off the Chilean coast.

Chile Earthquake
Data from the United States Geological Survey shows there have been repeated aftershocks in Chile. Photograph: /United States Geological Survey

4.39pm AEST

Here’s a little background on the state of emergency declared by Chilean president Michelle Bachelet from Jonathan in Chile:

Under Chilean law the state of emergency provision signed by President Bachelet allows members of the armed forces to patrol the streets and assist with law enforcement.

For many Chileans, the sight of military troops on the streets rekindle ugly memories of the Pinochet dictatorship in which thousands were killed and many more systematically tortured by security forces. But because of looting during earlier national emergencies – notably the 2010 earthquake in Southern Chile city of Concepcion – Chilean authorities, including socialist president Michelle Bachelet, are not shy about bolstering public security in moments of national disaster.

4.36pm AEST

Aftershocks and further earthquakes are continuing. There have been more than 10 aftershocks since the initial 8.2 magnitude quake.

In the last few hours low and medium sized earthquakes have struck Arica, Parinacota, Tarapaca and Antofagasta.

4.33pm AEST

With the coastal regions of Chile evacuated, tens, possibly hundreds of thousands of people have fled to higher ground.

Tsunami warning sirens were set off when a magnitude 8.2 earthquake hit at a depth of approximately 10km off the Pacific coast of the north of Chile. In videos taken shortly after the alert, people could be seen fleeing through the streets and climbing to hilltops.

4.14pm AEST

View of a large fire in the historical center of Iquique, Chile, 01 April 2014, after a 8.2 Richter scale earthquake hit in the Pacific Ocean, triggering a Tsunami, in the North of Chile.
View of a large fire in the historical center of Iquique, Chile, 01 April 2014, after a 8.2 Richter scale earthquake hit in the Pacific Ocean, triggering a Tsunami, in the North of Chile. Photograph: ALEX VALDES/EPA
An elderly person is evacuated from a shelter after a tsunami alarm at Antofagasta city, north of Santiago on the southern Pacific coast, April 1, 2014.
An elderly person is evacuated from a shelter after a tsunami alarm at Antofagasta city, north of Santiago on the southern Pacific coast, April 1, 2014. Photograph: STRINGER/REUTERS

3.59pm AEST

Tsunami warning cancelled for Peru, Chile

The Pacific Tsunami Warning centre has cancelled the tsunami warnings for Peru and Chile.

“Sea level readings indicate a tsunami was generated,” said the statement. “It may have been destructive along coasts near the earthquake epicentre.”

A tsunami advisory remains in place for Hawaii.

3.56pm AEST

There have been 11 hospitals evacuated due to floods, but all others are operating normally, National Director of ONEMI, Ricardo Toro said. The evacuated hospitals are: Mussels, Chañaral, Guasco, Taltal Toltén, Corral, Queilén, Achao, Balmaceda, Swans and Puerto Chacabuco.

3.45pm AEST

The Chilean president has declared a state of emergency for Arica and Parinacota and Tarapacá, reports CNN.

There has been some flooding in the streets of coastal areas, but no damage from the tsunami waves which reportedly reached more than 2m in some areas.

3.35pm AEST

Tsunami advisory issued for Hawaii

The Pacific Tsunami Warning Center has issued a tsunami advisory for Hawaii.

“Based on all available data, a major tsunami is not expected to strike the state of Hawaii,” it said.

“However, sea level changes and strong currents may occur along all coasts that could be a hazard to swimmers and boaters as well as to persons near the shore at beaches and in harbours and marinas.”

The first wave generated by the earthquake is expected to reach Hawaii at 3:24 a.m. There is already a tsunami warning in place for Chile and Peru.

3.25pm AEST

Ricardo Toro, head of the ONEMI national emergency services agency, has confirmed to media the entire Chilean coastline has been evacuated.

3.19pm AEST

The Chilean minister of the interior has confirmed the five deaths to media. Peñailillo also said 11 coastal hospitals have been evacuated for fears of tsunami and a planeload of prison guards and riot police is en route to Iquique.

3.17pm AEST

Omeni has confirmed some roads have been cut by landslides in Arica, Tarapaca, San Marcos and by floods in Coquimbo. Drinking water has been “preemptively” stopped in Arica.

3.12pm AEST

Reports: five dead in earthquake

CNN is reporting five people have been reported dead in the aftermath of the earthquake. Two reported earlier are believed to have died from heart attacks.

 

 

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Yellowstone: M 4.7 Earthquake , 37km ENE of West Yellowstone, Montana – 13 EQ ranging in Magnitude from 2.5 to 4.7 in the last 5 days 3/31/2014

 photo MontanaYellowstone-48MagEQ3302014_zps98c00d38.png

13 earthquakes in map area

  1. M 3.1 – 35km NNE of Old Faithful Geyser, Wyoming

     2014-03-31 23:32:45 UTC-05:00 3.6 km

  2. M 2.7 – 33km ENE of West Yellowstone, Montana

     2014-03-30 12:37:31 UTC-05:00 5.1 km

  3. M 3.3 – 32km ENE of West Yellowstone, Montana

     2014-03-30 10:12:24 UTC-05:00 6.0 km

  4. M 3.1 – 32km ENE of West Yellowstone, Montana

     2014-03-30 10:07:49 UTC-05:00 6.6 km

  5. M 2.9 – 33km ENE of West Yellowstone, Montana

     2014-03-30 08:56:41 UTC-05:00 3.9 km

  6. M 3.6 – 34km ENE of West Yellowstone, Montana

     2014-03-30 08:30:52 UTC-05:00 4.4 km

  7. M 4.7 – 37km ENE of West Yellowstone, Montana

     2014-03-30 07:34:39 UTC-05:00 5.6 km

  8. M 2.5 – 35km ENE of West Yellowstone, Montana

     2014-03-30 07:18:58 UTC-05:00 3.6 km

  9. M 3.4 – 35km ENE of West Yellowstone, Montana

     2014-03-30 05:36:25 UTC-05:00 3.9 km

  10. M 2.8 – 36km ENE of West Yellowstone, Montana

     2014-03-30 01:23:48 UTC-05:00 1.5 km

  11. M 2.5 – 30km ENE of West Yellowstone, Montana

     2014-03-26 20:24:06 UTC-05:00 6.2 km

  12. M 3.5 – 30km ENE of West Yellowstone, Montana

     2014-03-26 18:59:00 UTC-05:00 4.5 km

  13. M 3.0 – 30km ENE of West Yellowstone, Montana

     2014-03-26 14:14:36 UTC-05:00 6.4 km

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 Huffington Post Green

Yellowstone National Park Hit By Magnitude 4.8 Earthquake

Posted: 03/31/2014 8:51 am EDT Updated: 03/31/2014 8:59 am EDT
YELLOWSTONE


By Laura Zuckerman

March 30 (Reuters) – Yellowstone National Park, which sits atop one of the world’s largest super-volcanoes, was struck on Sunday by a magnitude 4.8 earthquake, the biggest recorded there since February 1980, but no damage or injuries were immediately reported.

The tremor, a relatively light event by seismic standards, struck the northwest corner of the park and capped a flurry of smaller quakes at Yellowstone since Thursday, geologists at the University of Utah Seismograph Stations said in a statement.

The latest earthquake struck at 6:34 a.m. near the Norris Geyser Basin and was felt about 23 miles (37 km) away in two small Montana towns adjacent to year-around entrances to the park – Gardiner and West Yellowstone.

The national park spans 3,472 square miles (8,992 square km) of Wyoming, Montana and Idaho, and draws about 3 million visitors each year to its iconic geysers and wildlife attractions, including bison.

A U.S. Geological Survey team planned to tour the Norris Geyser Basin on Sunday to determine if the quake altered any of Yellowstone’s geothermal features, such as geysers, mud pots and hot springs.

 

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Instrumental Intensity

ShakeMap Intensity Image

 

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Recent Earthquakes in the Intermountain West

Yellowstone National Park Special Map

Special Map

get updated list here

 

Update time = Sun Mar 30 18:00:04 MDT 2014
Here are the earthquakes appearing on this map, most recent at top …

 MAG    DATE    LOCAL-TIME  LAT     LON    DEPTH    LOCATION
        y/m/d     h:m:s     deg     deg     km
 3.3  2014/03/30 09:12:24 44.777N 110.723W  6.0   29 km (18 mi) S   of  Gardiner, MT
 3.1  2014/03/30 09:07:49 44.770N 110.720W  6.6   30 km (18 mi) S   of  Gardiner, MT
 2.5  2014/03/30 07:56:40 44.770N 110.714W  7.7   30 km (18 mi) S   of  Gardiner, MT
 3.1  2014/03/30 07:30:52 44.772N 110.698W  4.5   29 km (18 mi) S   of  Gardiner, MT
 4.8  2014/03/30 06:34:39 44.778N 110.683W  6.8   29 km (18 mi) S   of  Gardiner, MT
 3.0  2014/03/30 04:36:25 44.786N 110.690W  1.6   28 km (17 mi) S   of  Gardiner, MT
 2.8  2014/03/30 00:23:48 44.785N 110.681W  1.5   28 km (17 mi) S   of  Gardiner, MT
 0.5  2014/03/28 09:41:43 44.825N 110.781W  3.1   24 km (15 mi) SSW of  Gardiner, MT
 2.0  2014/03/28 05:37:16 44.839N 110.513W  7.1   27 km (17 mi) SE  of  Gardiner, MT
 1.9  2014/03/26 18:58:40 44.808N 110.773W  4.3   26 km (16 mi) S   of  Gardiner, MT
 2.2  2014/03/26 18:20:59 44.800N 110.772W  4.1   27 km (17 mi) S   of  Gardiner, MT
 1.5  2014/03/26 18:11:57 44.821N 110.774W  2.0   24 km (15 mi) S   of  Gardiner, MT
 2.0  2014/03/26 18:00:10 44.799N 110.774W  3.9   27 km (17 mi) S   of  Gardiner, MT
 3.5  2014/03/26 17:59:00 44.801N 110.778W  4.5   27 km (17 mi) S   of  Gardiner, MT
 3.0  2014/03/26 13:14:36 44.804N 110.772W  6.4   26 km (16 mi) S   of  Gardiner, MT
 1.4  2014/03/24 12:06:51 44.246N 110.444W  3.6   70 km (43 mi) SE  of  West Yellowstone, MT
 1.7  2014/03/24 05:21:37 44.778N 110.774W  7.5   29 km (18 mi) S   of  Gardiner, MT
 1.1  2014/03/23 22:55:22 44.574N 110.410W  2.7   56 km (35 mi) E   of  West Yellowstone, MT

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UPI

Ancient helium rising to the surface in Yellowstone National Park

Feb. 20, 2014 at 4:46 PM

Steam plumes rise above thermal features at Yellowstone National Park. The U.S. Geological Survey determined the famed national park was releasing hundreds — if not thousands — of times more helium than anticipated. Credit: Ken McGee/U.S. Geological Survey

MENLO PARK, Calif., Feb. 20 (UPI) — Helium, trapped underground for 2 billion years, is bubbling to the surface from steam vents and hot springs of Yellowstone National Park, U.S. researchers say.Researchers with the U.S. Geological Survey say the park, located mostly in Wyoming, was releasing hundreds, even possible thousands, of times more of the ancient helium than previously thought, the Los Angeles Times reported Thursday.

About 60 tons are being release each year, enough helium to fill one Goodyear blimp every week, researchers said in a report published in the journal Nature.

Volcanic activity beginning about 2 million years ago initiated the release, they said.

That counts as a “sudden” release compared with how long the helium has been trapped within the Earth’s surface, study coauthor Bill Evans, a research chemist at the USGS office in Menlo Park, Calif., said.

 

 

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Earth Watch Report  -  Earthquakes

 
 photo Oklahoma-31EQinlast7days03262014_zps97b72426.png

31 earthquakes in map area

  1. M 2.7 – 6km SSW of Langston, Oklahoma

     2014-03-26 09:24:20 UTC-05:00 5.0 km

  2. M 2.6 – 31km WSW of McAlester, Oklahoma

     2014-03-25 15:52:17 UTC-05:00 5.0 km

  3. M 3.4 – 12km NW of Edmond, Oklahoma

     2014-03-25 09:01:19 UTC-05:00 6.1 km

  4. M 2.8 – 4km NNW of Stroud, Oklahoma

     2014-03-24 18:32:46 UTC-05:00 7.8 km

  5. M 2.7 – 10km E of Medford, Oklahoma

     2014-03-24 10:39:59 UTC-05:00 5.0 km

  6. M 2.5 – 21km SSE of Medford, Oklahoma

     2014-03-22 22:37:23 UTC-05:00 5.0 km

  7. M 3.3 – 11km ENE of Medford, Oklahoma

     2014-03-22 14:42:11 UTC-05:00 5.0 km

  8. M 2.9 – 14km SSE of Medford, Oklahoma

     2014-03-22 14:30:12 UTC-05:00 5.0 km

  9. M 3.0 – 19km SSE of Medford, Oklahoma

     2014-03-22 14:15:54 UTC-05:00 5.0 km

  10. M 2.5 – 7km SSW of Langston, Oklahoma

     2014-03-22 13:40:44 UTC-05:00 5.0 km

  11. M 2.8 – 8km ENE of Stillwater, Oklahoma

     2014-03-22 12:43:55 UTC-05:00 5.0 km

  12. M 2.7 – 4km SSW of Langston, Oklahoma

     2014-03-22 10:58:20 UTC-05:00 5.0 km

  13. M 4.0 – 12km S of Langston, Oklahoma

     2014-03-21 22:05:59 UTC-05:00 4.5 km

  14. M 3.1 – 7km SSW of Langston, Oklahoma

     2014-03-21 22:02:35 UTC-05:00 4.5 km

  15. M 3.1 – 7km SSW of Langston, Oklahoma

     2014-03-21 22:01:32 UTC-05:00 7.6 km

  16. M 2.6 – 3km SE of Langston, Oklahoma

     2014-03-21 21:35:01 UTC-05:00 6.9 km

  17. M 2.9 – 4km SSE of Langston, Oklahoma

     2014-03-21 21:30:34 UTC-05:00 5.0 km

  18. M 2.6 – 1km SE of Choctaw, Oklahoma

     2014-03-21 17:41:07 UTC-05:00 6.7 km

  19. M 2.6 – 1km SE of Choctaw, Oklahoma

     2014-03-21 14:59:40 UTC-05:00 5.0 km

  20. M 2.7 – 9km NNW of Yale, Oklahoma

     2014-03-21 14:11:45 UTC-05:00 7.3 km

  21. M 2.7 – 10km N of Guthrie, Oklahoma

     2014-03-21 06:20:54 UTC-05:00 5.0 km

  22. M 2.9 – 15km NNE of Crescent, Oklahoma

     2014-03-21 04:05:46 UTC-05:00 3.8 km

  23. M 2.8 – 9km SE of Cherokee, Oklahoma

     2014-03-21 01:43:13 UTC-05:00 9.7 km

  24. M 2.8 – 14km NNE of Crescent, Oklahoma

     2014-03-21 01:01:32 UTC-05:00 4.3 km

  25. M 2.5 – 9km NW of Prague, Oklahoma

     2014-03-21 00:46:59 UTC-05:00 5.0 km

  26. M 3.3 – 20km NNE of Enid, Oklahoma

     2014-03-20 17:42:32 UTC-05:00 3.9 km

  27. M 2.8 – 5km SSW of Langston, Oklahoma

     2014-03-20 11:48:49 UTC-05:00 4.4 km

  28. M 2.6 – 5km SSW of Langston, Oklahoma

     2014-03-20 11:46:54 UTC-05:00 4.2 km

  29. M 3.2 – 3km S of Langston, Oklahoma

     2014-03-20 09:39:17 UTC-05:00 5.0 km

  30. M 3.1 – 22km SSE of Medford, Oklahoma

     2014-03-20 00:12:23 UTC-05:00 4.4 km

  31. M 2.6 – 21km SSE of Medford, Oklahoma

     2014-03-20 00:08:48 UTC-05:00 3.5 km

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Instrumental Intensity

ShakeMap Intensity Image

 

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New 9.com

Shake ‘Em Up: 4 Earthquakes Roar In Central Oklahoma

Posted: Mar 21, 2014 10:39 PM CST Updated: Mar 21, 2014 10:47 PM CST

Four earthquakes rumbled around central Oklahoma, Friday night.

Four earthquakes rumbled around central Oklahoma, Friday night.

LANGSTON, Oklahoma –

Multiple earthquakes shook up residents in central Oklahoma, Friday night.

The first earthquake struck around 9:35 p.m. and weighed in at a 2.6 on the Richter scale. It was recorded one mile southeast of Langston, or about 34 mile north northeast of the Oklahoma City metro, at a depth of just over three miles.

A second earthquake shook just after 10 p.m. This quake was a 2.8 on the Richter scale and was recorded at a depth of four miles. Its epicenter was located three miles south southwest of Langston.

Then the third and largest earthquake rumbled. At approximately 10:05 p.m., a 4.0 magnitude temblor rattled seven miles south of town at a depth of about two and a half miles.

 

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Earth Watch Report  -  Earthquakes

 

Contributed by Northern California Seismic System, UC Berkeley and USGS Menlo Park

Instrumental Intensity

ShakeMap Intensity Image

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M 6.8 – 77km WNW of Ferndale, California

 2014-03-10 05:18:13 UTC

Earthquake location 40.829°N, 125.134°W

Event Time

  1. 2014-03-10 05:18:13 UTC
  2. 2014-03-09 21:18:13 UTC-08:00 at epicenter
  3. 2014-03-10 00:18:13 UTC-05:00 system time

Location

40.829°N 125.134°W depth=16.6km (10.3mi)

Nearby Cities

  1. 77km (48mi) WNW of Ferndale, California
  2. 81km (50mi) W of Eureka, California
  3. 85km (53mi) WNW of Fortuna, California
  4. 87km (54mi) W of McKinleyville, California
  5. 398km (247mi) NW of Sacramento, California

 

Tectonic Summary

The March 10, 2014 Mw6.9 earthquake off the coast of northern California occurred as the result of the oblique strike slip motion on a fault approximately 80 km offshore of Eureka, California. The preliminary location places the earthquake within the Juan de Fuca plate (or Gorda subplate), which subducts beneath northern California, Oregon, and Washington at a rate of ~23 mm/yr. This location is outboard of the trench in the oceanic crust. The earthquake was widely felt along the coast of northern California and southern Oregon, particularly in the city of Eureka.

The general tectonics of this region are characterized by transitions between oceanic subduction of the Juan de Fuca plate beneath the Pacific northwest region and the continuation of the San Andreas Fault offshore. The intersection of the Juan de Fuca, North America, and Pacific plates forms the Mendocino Triple Junction off the west coast of California, with the subduction zone extending to the north and the San Andreas Fault diverging to the west offshore and continuing to the south. The offshore extension of the San Andreas Fault and southern extent of the Juan de Fuca plate are defined by the easternmost exposure of the Mendocino Fracture Zone. Several large earthquakes have occurred in this region since 1900 within 100 km of the March 2014 event, including events of M7.2 in 1922, M7.1 in 1923, M7.3 in 1980, M7.0 in 1994, M7.2 in 2005, as well as several events near the coast or inland of California, including the 1992 M7.2 Petrolia earthquake with its M6.6 and M6.4 aftershocks. Most recently, an earthquake of M6.5 in January 2010 with a similar faulting mechanism to the March 2014 event occurred. 

 

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Depth, distance reduce impact of California quake

Monday, March 10, 2014

 

EUREKA, Calif. — One of the largest earthquakes to hit California in decades rattled the state’s northern coast, but its depth and distance from shore reduced the impact on land, where there were no reports of injuries or damage, scientists and authorities said on Monday.

The magnitude-6.8 quake struck at 10:18 p.m. PDT Sunday and was centered 50 miles west of Eureka and about 10 miles beneath the Pacific seabed, according to the U.S. Geological Survey. It was initially reported as a magnitude-6.9, but later downgraded.

By late Monday morning, it had already produced 20 aftershocks of magnitude-3.5 or larger, and more were expected over the coming days, said Keith Knudsen, deputy director of the USGS’s Earthquake Science Center in Menlo Park, Calif.

Knudsen said there was also a 5 to 10 percent chance of a larger quake in the area in the next week.

Sunday’s quake was felt widely across the region, but both fire and sheriff’s officials in Humboldt County said they had no reports of any damage or injuries. Humboldt County includes most of the populated areas closest to the epicenter.

 

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Earthquake Today: 6.9-Magnitude Quake Rattles N. California

EUREKA, Calif. (AP) — A powerful magnitude-6.9 earthquake struck late Sunday night off the coast of Northern California, but there were no immediate reports of injury or damage and no danger of a tsunami, officials said.

The temblor struck at 10:18 p.m. PDT and was centered 50 miles west of Eureka and about four miles beneath the Pacific seabed, according to the U.S. Geological Survey. It was followed by about a half-dozen aftershocks, including one of magnitude 4.6.

There were no reports of any damages or injuries though the quake was felt widely and strongly, according sheriff’s and fire officials in Humboldt County, which includes most of the populated areas near the epicenter.

The National Tsunami Warning Center said there was no tsunami danger for the region.

 

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Northern California unscathed by 6.8 offshore quake

LOS ANGELES Mon Mar 10, 2014 2:52pm EDT

 

 

(Reuters) – A series of small aftershocks continued to rattle the extreme northern coast of California on Monday, hours after a magnitude 6.8 earthquake shook the town of Eureka and an area extending into Oregon and Nevada with no reports of damage.

The main tremor, which struck at about 10:30 p.m. on Sunday, was centered in the Pacific about 50 miles west of Eureka and 10 miles beneath the ocean floor, according to the U.S. Geological Survey.

While earthquakes of that size can unleash widespread destruction if they score a direct hit on an urban area, as the 1994 Northridge quake did in Los Angeles, the impact of Sunday’s tremor was largely buffered by its location out at sea, seismologists said.

Shaking from the quake was felt most strongly by residents in Eureka, a coastal community about 270 miles north of San Francisco, and the nearby town of Arcata, site of Humboldt State University, the USGS reported.

But no tsunami warnings were issued, and the morning watch commander for the Eureka police department, Sergeant Steve Watson, said there were no reports of injuries or damage to property in town.

 

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M 6.1 – 138km NNW of Amukta Island, Alaska

 2014-02-26 21:13:40 UTC

Earthquake location 53.679°N, 171.837°W

Event Time

  1. 2014-02-26 21:13:40 UTC
  2. 2014-02-26 10:13:40 UTC-11:00 at epicenter
  3. 2014-02-26 15:13:40 UTC-06:00 system time

Location

53.679°N 171.837°W depth=264.7km (164.5mi)

Nearby Cities

  1. 138km (86mi) NNW of Amukta Island, Alaska
  2. 1371km (852mi) SSE of Anadyr’, Russia
  3. 1550km (963mi) WSW of Anchorage, Alaska
  4. 1578km (981mi) WSW of Knik-Fairview, Alaska
  5. 2321km (1442mi) W of Whitehorse, Canada

 

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Instrumental Intensity

ShakeMap Intensity Image

 

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Tectonic Summary

Seismotectonics of Alaska

The Aleutian arc extends approximately 3,000 km from the Gulf of Alaska in the east to the Kamchatka Peninsula in the west. It marks the region where the Pacific plate subducts into the mantle beneath the North America plate. This subduction is responsible for the generation of the Aleutian Islands and the deep offshore Aleutian Trench.

The curvature of the arc results in a westward transition of relative plate motion from trench-normal (i.e., compressional) in the east to trench-parallel (i.e., translational) in the west, accompanied by westward variations in seismic activity, volcanism, and overriding plate composition. The Aleutian arc is generally divided into three regions: the western, central, and eastern Aleutians. Relative to a fixed North America plate, the Pacific plate is moving northwest at a rate that increases from roughly 60 mm/yr at the arc’s eastern edge to 76 mm/yr near its western terminus. The eastern Aleutian arc extends from the Alaskan Peninsula in the east to the Fox Islands in the west. Motion along this section of the arc is characterized by arc-perpendicular convergence and Pacific plate subduction beneath thick continental lithosphere. This region exhibits intense volcanic activity and has a history of megathrust earthquakes.

The central Aleutian arc extends from the Andreanof Islands in the east to the Rat Islands in the west. Here, motion is characterized by westward-increasing oblique convergence and Pacific plate subduction beneath thin oceanic lithosphere. Along this portion of the arc, the Wadati-Benioff zone is well defined to depths of approximately 200 km. Despite the obliquity of convergence, active volcanism and megathrust earthquakes are also present along this margin.

The western Aleutians, stretching from the western end of the Rat Islands in the east to the Commander Islands, Russia, in the west, is tectonically different from the central and eastern portions of the arc. The increasing component of transform motion between the Pacific and North America plates is evidenced by diminishing active volcanism; the last active volcano is located on Buldir Island, in the far western portion of the Rat Island chain. Additionally, this portion of the subduction zone has not hosted large earthquakes or megathrust events in recorded history. Instead, the largest earthquakes in this region are generally shallow, predominantly strike-slip events with magnitudes between M5-6. Deeper earthquakes do occur, albeit rather scarcely and with small magnitudes (M<4), down to approximately 50 km.

Most of the seismicity along the Aleutian arc results from thrust faulting that occurs along the interface between the Pacific and North America plates, extending from near the base of the trench to depths of 40 to 60 km. Slip along this interface is responsible for generating devastating earthquakes. Deformation also occurs within the subducting slab in the form of intermediate-depth earthquakes that can reach depths of 250 km. Normal faulting events occur in the outer rise region of the Aleutian arc resulting from the bending of the oceanic Pacific plate as it enters the Aleutian trench. Additionally, deformation of the overriding North America plate generates shallow crustal earthquakes.

The Aleutian arc is a seismically active region, evidenced by the many moderate to large earthquakes occurring each year. Since 1900, this region has hosted twelve large earthquakes (M>7.5) including the May 7, 1986 M8.0 Andreanof Islands, the June 10, 1996 M7.9 Andreanof Islands, and the November 17, 2003 M7.8 Rat Islands earthquakes. Six of these great earthquakes (M8.3 or larger) have occurred along the Aleutian arc that together have ruptured almost the entire shallow megathrust contact. The first of these major earthquakes occurred on August 17, 1906 near the island of Amchitka (M8.3) in the western Aleutian arc. However, unlike the other megathrust earthquakes along the arc, this event is thought to have been an intraplate event occurring in the shallow slab beneath the subduction zone interface.

The first megathrust event along the arc during the 20th century was the November 10, 1938 M8.6 Shumagin Island earthquake. This event ruptured an approximately 300 km long stretch of the arc from the southern end of Kodiak Island to the northern end of the Shumagin Islands and generated a small tsunami that was recorded as far south as Hawaii.

The April 1, 1946 M8.6 Unimak Island earthquake, located in the central Aleutian arc, was characterized by slow rupture followed by a devastating Pacific-wide tsunami that was observed as far south as the shores of Antarctica. Although damage from earthquake shaking was not severe locally, tsunami run-up heights were recorded as high as 42 m on Unimak Island and tsunami waves in Hilo, Hawaii also resulted in casualties. The slow rupture of this event has made it difficult to constrain the focal mechanism and depth of the earthquake, though it is thought to have been an interplate thrust earthquake.

The next megathrust earthquake occurred along the central portion of the Aleutian arc near the Andreanof Islands on March 9, 1957, with a magnitude of M8.6. The rupture length of this event was approximately 1200 km, making it the longest observed aftershock zone of all the historic Aleutian arc events. Although only limited seismic data from this event are still available, significant damage and tsunamis were observed on the islands of Adak and Unimak with tsunami heights of approximately 13 m.

The easternmost megathrust earthquake was the March 28, 1964 M9.2 Prince William Sound earthquake, currently the second largest recorded earthquake in the world. The event had a rupture length of roughly 700 km extending from Prince William Sound in the northeast to the southern end of Kodiak Island in the southwest. Extensive damage was recorded in Kenai, Moose Pass, and Kodiak but significant shaking was felt over a large region of Alaska, parts of western Yukon Territory, and British Columbia, Canada. Property damage was the largest in Anchorage, as a result of both the main shock shaking and the ensuing landslides. This megathrust earthquake also triggered a devastating tsunami that caused damage along the Gulf of Alaska, the West Coast of the United States, and in Hawaii.

The westernmost Aleutians megathrust earthquake followed a year later on February 4, 1965. This M8.7 Rat Islands earthquake was characterized by roughly 600 km of rupture. Although this event is quite large, damage was low owing to the region’s remote and sparsely inhabited location. A relatively small tsunami was recorded throughout the Pacific Ocean with run-up heights up to 10.7 m on Shemya Island and flooding on Amchitka Island.

Although the Aleutian arc is highly active, seismicity is rather discontinuous, with two regions that have not experienced a large (M>8.0) earthquake in the past century: the Commander Islands in the western Aleutians and the Shumagin Islands in the east. Due to the dominantly transform motion along the western arc, there is potential that the Commander Islands will rupture in a moderate to large strike-slip earthquake in the future. The Shumagin Islands region may also have high potential for hosting a large rupture in the future, though it has been suggested that little strain is being accumulated along this section of the subduction zone, and thus associated hazards may be reduced.

East of the Aleutian arc along the Gulf of Alaska, crustal earthquakes occur as a result transmitted deformation and stress associated with the northwestward convergence of the Pacific plate that collides a block of oceanic and continental material into the North America plate. In 2002, the Denali Fault ruptured in a sequence of earthquakes that commenced with the October 23 M6.7 Nenana Mountain right-lateral strike-slip earthquake and culminated with the November 3, M7.9 Denali earthquake which started as a thrust earthquake along a then unrecognized fault and continued with a larger right-lateral strike-slip event along the Denali and Totschunda Faults.

More information on regional seismicity and tectonics

 

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Alaska Dispatch

Big 6.1 quake shakes Alaska in Aleutians:

 

A 6.1 earthquake shook the Alaska communities of Nikolski and Unalaska Wednesday, according to the Alaska Earthquake Center. The strong shake occurred around noon in the Bering Sea region of the state. The center says the earthquake had a preliminary magnitude of 6.1 and was located at a depth of 23 miles. The towns, located near the mid-section of the arc of the Aleutian Islands stretching more than 1,000 miles toward Asia, reportedly didn’t suffer any damages. Quakes with magnitudes of about 4.5 or greater are strong enough to be recorded by sensitive seismographs worldwide. Great earthquakes, such as Alaska’s 1964 Good Friday earthquake, have magnitudes of 8.0 or higher. The U.S. Geological Survey says that on average, one earthquake of that size occurs somewhere in the world each year.

 

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