Dear RHESSI Collaborators,
The current level of solar activity is moderate. Yesterday's target (NOAA 11928) emerged further flux and shows a new highly sheared mixed polarity spot in its intermediate portion. The region was responsible for C-class activity including a C8.5 flare on 20-Dec-2013 at 15:33 UT. On the other hand, NOAA 11931 has rotated onto the East limb and was responsible for the two largest events of the previous 24 hours, a M3.5 flare on 19-Dec-2013 at 23:19 UT and a M1.6 flare on 20-Dec-2013 at 11:57 UT. While the magnetic configuration of NOAA 11931 is not as complex as NOAA 11928, its coronal structure did not appear significantly altered after the M-class flares, and so it may be capable of further significant activity. The target region is now designated as NOAA 11931. Further high C-class activity is expected with a chance for further low M-class events.
The position of NOAA 11931 on 20-Dec-2013 at 18:45 UT is: S15E52, ( -741", -236" )
See http://www.SolarMonitor.org for images and http://solar.physics.montana.edu/max_millennium/ops/observing.shtml for a description of the current Max Millennium Observing Plan.
Regards,
Paul Higgins (Trinity College Dublin/LMSAL) Received on Fri Dec 20 2013 - 11:49:08 MST