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Solar flares from active region 2945
C7
M3
X0
LargestM1.21981-02-13
Span6 days
Flares by day
1
3
2
4
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1981-02-12 | 07:08 | 07:08 | 13 | C2.6 | N13E80 | 2945 |
| 1981-02-13 | 06:15 | 06:17 | 24 | M1.2 | N14E69 | 2945 |
| 1981-02-13 | 07:55 | 07:56 | 9 | M1.1 | N14E69 | 2945 |
| 1981-02-13 | 16:49 | 16:52 | 8 | C2.6 | – | 2945 |
| 1981-02-15 | 19:37 | 19:40 | 9 | C4.3 | – | 2945 |
| 1981-02-15 | 21:10 | 21:13 | 5 | M1.1 | N12E29 | 2945 |
| 1981-02-17 | 02:13 | 02:16 | 5 | C2.0 | – | 2945 |
| 1981-02-17 | 02:15 | 02:48 | 46 | C2.1 | N15E49 | 2945 |
| 1981-02-17 | 04:11 | 04:11 | 12 | C2.5 | N14E17 | 2945 |
| 1981-02-17 | 05:23 | 05:25 | 12 | C1.6 | N14E17 | 2945 |
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 2945 produced 10 C+ flares between 1981-02-12 and 1981-02-17.