Sunspot 1283 bristling with flares: An X1.8 and an M6.7
Thursday, September 8, 2011 - 16:30
in Astronomy & Space
A third and fourth flare have erupted from sunspot 1283. The third came on September 7 at 6:36 PM ET, and was categorized as an X1.8 by the GOES spacecraft, making it the second X-class flare within 24 hours.