Nifty close-up movie of today's M-flare:

[link to sdowww.lmsal.com]

:3/21-Mflare:

Nice Post-Flare Loops=
:3/21-loops:

Latest from NOAA-

Solar Activity

.24 hr Summary...
Solar activity has been at moderate levels for the past 24 hours. The
largest event of the period was a M1 x-ray event at 2204 UTC from Region
1692 (N09W85, Dko/beta). Region 1692 continues to be the most complex
and active region on the disk, however Region 1692 is due to rotate off
the visible disk in the next 24 hours. Two new regions were observed
emerging on the disk during the period. Region 1702 (N08W24/Dro/beta)
was numbered late in the period and is magnetically classified as a
beta. The yet to be numbered region in the southwest is still developing
and awaiting further verification at the time of this report. There were
no Earth-directed coronal mass ejections (CMEs) detected in satellite
imagery during the period.
[link to www.swpc.noaa.gov]

A small CME was seen on SDO beyond the east limb just minutes before the M-flare on the west limb. This eruption may be seen at the very end of the STEREO B movie:
[link to stereo.gsfc.nasa.gov]

East Limb CME-
:3/21cme-east: