M9-Flare Producing Active Regions

These are the active regions from the past two solar cycles which produced M9-class flares. The peak soft X-ray flux for many of these exceeded the X threshold, but after accounting for the nonflaring solar emission, they just missed the cut. Most have observations from the Mees Solar Observatory Imaging Vector Magnetograph (IVM) and Haleakala Stokes Polarimeter (HSP). Flares observed during Mees hours with the Mees CCD Imaging Spectrograph (MCCD) are linked through. Additional regions will be added as more events occur and more observations are analyzed.

30-Jun-1988 09:16 S16E22 M9.2	08-Nov-1989 20:36 N20W57 M9.8
06-Nov-1989 14:33 N20E19 M9.2	15-Apr-1991 10:21 S11E70 M9.8
24-Oct-1991 24:15 S12E46 M9.8 02-Nov-1991 07:27 S13W61 M9.1 X-Flare region	06-Feb-1993 20:32 N12E26 M9.6
24-Jun-1993 09:46 S11E64 M9.7	20-Aug-1999 23:10 S25E64 M9.8 X-Flare region
09-Sep-2001 20:48 S31E26 M9.5	08-Nov-2001 07:06 S19W19 M9.1
22-Nov-2002 00:06 M9.9 X-Flare region	09-Jan-2002 18:12 N13W02 M9.5
31-May-2003 02:40 S07W65 M9.3 X-Flare region	20-Nov-2003 07:47 N03E15 M9.6
22-Jul-2004 00:14 N03E17 M9.1	15-Aug-2004 12:34 S13W42 M9.4 X-Flare region
06-Nov-2004 00:34 N09E04 M9.3 X-Flare region

The M9-class flare list, gleaned from records at the Space Environment Center.

Last modified: Tue Nov 9 08:05:13 EST 2004