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Solar flares from active region 11303
C2
M3
X0
LargestM1.52011-09-25
Span3 days
Flares by day
2
2
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2011-09-24 | 21:23 | 21:27 | 9 | M1.2 | – | 11303 |
| 2011-09-24 | 23:45 | 23:58 | 24 | M1.0 | – | 11303 |
| 2011-09-25 | 09:25 | 09:35 | 28 | M1.5 | – | 11303 |
| 2011-09-25 | 22:29 | 22:32 | 7 | C8.6 | – | 11303 |
| 2011-09-26 | 01:39 | 01:47 | 18 | C9.5 | – | 11303 |
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4× larger. Do not compare the two periods directly.
About this page
NOAA active region 11303 produced 5 C+ flares between 2011-09-24 and 2011-09-26.