SEL EVENT # 1820 in NOAA AR 1376
Date: 2011, Dec 21
Start Time 1807 UT; Max Time 1812 UT; End Time 1817 UT
Coordinates: N22W58
Flare type: X-ray flare and Optical flare observed in H-alpha
Additional: Several eruptive centers
GOES X-ray Class: C1.9 ( Integrated flux from start to end: 8.2E-04 )
Optical: SF

Below are an MPEG movie for this event, GOES flux plot and data file and several snapshots.