Earth Watch Report - Earthquakes
M6.2 – 6km NNW of San Jose Pinula, Guatemala 2013-03-25 23:02:14 UTC
- 2013-03-25 23:02:14 UTC
- 2013-03-25 17:02:14 UTC-06:00 at epicenter
- 2013-03-25 18:02:14 UTC-05:00 system time
14.599°N 90.428°W depth=200.5km (124.6mi)
- 6km (4mi) NNW of San Jose Pinula, Guatemala
- 8km (5mi) ENE of Santa Catarina Pinula, Guatemala
- 10km (6mi) ESE of Guatemala City, Guatemala
- 10km (6mi) SW of Palencia, Guatemala
- 14km (9mi) SSE of Chinautla, Guatemala
Seismotectonics of the Caribbean Region and Vicinity
Extensive diversity and complexity of tectonic regimes characterizes the perimeter of the Caribbean plate, involving no fewer than four major plates (North America, South America, Nazca, and Cocos). Inclined zones of deep earthquakes (Wadati-Benioff zones), ocean trenches, and arcs of volcanoes clearly indicate subduction of oceanic lithosphere along the Central American and Atlantic Ocean margins of the Caribbean plate, while crustal seismicity in Guatemala, northern Venezuela, and the Cayman Ridge and Cayman Trench indicate transform fault and pull-apart basin tectonics.
Along the northern margin of the Caribbean plate, the North America plate moves westwards with respect to the Caribbean plate at a velocity of approximately 20 mm/yr. Motion is accommodated along several major transform faults that extend eastward from Isla de Roatan to Haiti, including the Swan Island Fault and the Oriente Fault. These faults represent the southern and northern boundaries of the Cayman Trench. Further east, from the Dominican Republic to the Island of Barbuda, relative motion between the North America plate and the Caribbean plate becomes increasingly complex and is partially accommodated by nearly arc-parallel subduction of the North America plate beneath the Caribbean plate. This results in the formation of the deep Puerto Rico Trench and a zone of intermediate focus earthquakes (70-300 km depth) within the subducted slab. Although the Puerto Rico subduction zone is thought to be capable of generating a megathrust earthquake, there have been no such events in the past century. The last probable interplate (thrust fault) event here occurred on May 2, 1787 and was widely felt throughout the island with documented destruction across the entire northern coast, including Arecibo and San Juan. Since 1900, the two largest earthquakes to occur in this region were the August 4, 1946 M8.0 Samana earthquake in northeastern Hispaniola and the July 29, 1943 M7.6 Mona Passage earthquake, both of which were shallow thrust fault earthquakes. A significant portion of the motion between the North America plate and the Caribbean plate in this region is accommodated by a series of left-lateral strike-slip faults that bisect the island of Hispaniola, notably the Septentrional Fault in the north and the Enriquillo-Plantain Garden Fault in the south. Activity adjacent to the Enriquillo-Plantain Garden Fault system is best documented by the devastating January 12, 2010 M7.0 Haiti strike-slip earthquake, its associated aftershocks and a comparable earthquake in 1770.
Guatemala Earthquake 6.2 Magnitude Strikes it’s Pacific Coastline
Added by gricelda7
on March 25, 2013.
GUATEMALA CITY — A 6.2-magnitude earthquake shook Guatemala’s Pacific coastline on Monday at 4.02 .p.m. PT
The USGS said Monday that the 6.2 earthquake, which struck Guatemala was located 3 miles (6 kilometers) northwest of San Jose Pinula and had a depth of 200 kilometers (124 miles).
Guatemalan authorities had no immediate reports of damage.
In November 2012, another large earthquake occurred. Seismologists commented at the time that there were strong aftershocks from the 7.5-magnitude earthquake. It killed 52 people in western Guatemala and was felt as far as Mexico City.
Earthquakes of magnitude 6.0 and over have the potential of causing severe damage.
The epicenter of the 6.2 magnitude earthquake, initially reported as a magnitude 5.8, was only 6 miles southeast of Guatemala City but it was at a depth of 124.6 miles, lessening its effect.
David de Leon, a spokesman for Guatemala’s emergency agency, CONRED, said he had no reports of damage or victims.
Last November, more than 50 people were killed in a 7.5 magnitude quake in Guatemala in San Marcos state, a mountainous region near the Mexican border.