[BAA-ebulletin 00767] BAA Solar Section - Activity Warning

[Rick]

[BAA-ebulletin 00767] BAA Solar Section - Activity Warning
(c) 2013 British Astronomical Association    http://www.britastro.org/

Active Region 1882 has unleashed two X-class solar flares today.  AR1875 and AR1877 are also currently active.  Observations/images are requested in the coming days from these sunspot groups. NOAA activity warning is produced below:

Solar activity is very high. New region NOAA 11882 in the SE produced two X-class flares; an X1.7 at 07:53 UT and an X2.1 at 14:51 UT today. It also produced two M-class flares. Numerous C-class flares were observed from regions NOAA 11875 and 11882, as well as a C1.8 from NOAA 11869 (N12 over the west limb) at 13:06 UT. NOAA 11882 was too near the limb yesterday for a good determination of its magnetic field configuration, but current SDO magnetograms show it as beta-gamma-delta class. This region is expected to produce M-class flares and an additional X-class flare is possible.

NOAA 11875 may produce an additional M-class event, but an X-class flare seems less likely from this region. NOAA 11877 may produce an M-class flare.

NOAA 11882, S08 E63 (X=-853,Y=-172). Beta-gamma-delta region.
NOAA 11875, N08 W33 (X= 523,Y= 64). Beta-gamma-delta region.
NOAA 11877, S12 W13 (X= 213,Y=-281). Beta-gamma region.