Daily Sun: 21 July 13
Sunspot AR1793 has a beta-gamma magnetic field that harbors energy for M-class solar flares. However, the sunspot is quiet. Credit: SDO/HMI
Solar activity is low. The biggest sunspot on the Earthside of the sun, AR1783, has been quiet for days even though it has a ‘beta-gamma’ magnetic field that harbors energy for M-class solar flares. NOAA forecasters estimate a slim 10% chance that AR1783 will break the quiet with an M-flare on July 21st.
Earth is inside a solar wind stream flowing from the indicated coronal hole. Credit: SDO/AIA.