Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 11305
C6
M3
X0
LargestM3.92011-10-02
Span9 days
Flares by day
1
2
2
2
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2011-09-29 | 10:19 | 10:23 | 6 | C1.3 | – | 11305 |
| 2011-09-30 | 03:37 | 04:00 | 36 | C7.7 | – | 11305 |
| 2011-09-30 | 18:55 | 19:06 | 20 | M1.0 | – | 11305 |
| 2011-10-01 | 03:50 | 03:56 | 14 | C1.3 | – | 11305 |
| 2011-10-01 | 08:56 | 09:59 | 81 | M1.2 | – | 11305 |
| 2011-10-02 | 00:37 | 00:50 | 22 | M3.9 | – | 11305 |
| 2011-10-02 | 21:20 | 21:49 | 45 | C7.6 | – | 11305 |
| 2011-10-06 | 22:06 | 22:10 | 7 | C1.2 | – | 11305 |
| 2011-10-07 | 00:42 | 00:47 | 7 | C1.0 | – | 11305 |
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 11305 produced 9 C+ flares between 2011-09-29 and 2011-10-07.