Dear RHESSI Collaborators,
The level of solar activity is moderate. NOAA region 11818
has continued to emerge flux but remains mainly bipolar.
The region was only responsible for B-class activity. On the
other hand, yesterday's target region, NOAA 11817 has also
continued to emerge further flux: two bipolar structures are
currently emerging adjacent to each other in the trailing and
intermediate portions of the region. This has caused a delta
spot to form at its center. There is evidence for shearing
along the region's strong horizontal polarity separation line.
In addition to a number of C-class events, NOAA 11817 was
responsible for an M1.5 flare on 12-Aug-2013 at 10:41 UT. If
the negative portion of the delta spot continues to grow, large
flares may be expected. At this time, further high C-class
activity is expected with a chance for further M-class events.
The position of NOAA 11817 on 12-Aug-2013 at 17:30 UT is:
S22E13, ( -191", -451" )
See http://www.SolarMonitor.org for images and