Published on Dec 28, 2013
Energetic protons are swarming around Earth on Dec. 28th following a magnetic eruption near the western limb of the sun: movie. The ongoing radiation storm ranks S1 on NOAA storm scales, which means it is a relatively minor storm with little effect on spacecraft and high-altitude aviation
AR1936 is waking up. The sunspot has a ‘beta-gamma-delta’ magnetic field that harbors energy for strong eruptions, yet it has been quiet for days. Now AR1936 is beginning to crackle with flares. NASA’s Solar Dynamics Observatory recorded the extreme ultraviolet flash from an almost-M-class flare at 1800 UT on Dec. 28th:
Because the sunspot is facing Earth, any flares emanating from it are going to be geoeffective. So far, the extreme ultraviolet “crackles” have produced only minor waves of ionization in our planet’s upper atmosphere. Earth-effects will increase, however, if the activity continues to intensify.