AURORAL ACTIVITY: MAJOR STORM WATCH The geomagnetic field is expected to be at quiet to active levels on May 19-20 with a chance for isolated minor to major storm periods at high latitude regions. GEOMAGNETIC
SOLAR ACTIVITY: X-CLASS FLARES - X1.7 - X2.8 - X3.2 - X1.2 Region 1748 produced four X-class flares - the strongest events of 2013: X1.7 at 02:17 UTC, X2.8 at 16:09 UTC on May 13, X3.2 at 01:11 UTC on May 14 and M1.2 at 01:48 UTC on May 15. Solar activity is expected to be at moderate levels with a chance for additional X-class events. SOLAR ACTIVITY PAGE X-CLASS FLARE HISTORY 2006-2013
ARCTIC CIRCLE AURORA BOREALIS Alaska, March 16-17, 2013
Sunspot region 1692 produced a long duration M1.1 flare at 06:58 UTC on March 15, 2013 associated with a large full halo coronal mass ejection (CME). The CME reached the Earth near 6 UTC on March 17 and triggered a 12 hour-long geomagnetic storm producing colorful Northern Lights at the Arctic Circle in Alaska - visible as far South as the Northern tier of the United States.