Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 2930
C38
M8
X0
LargestM3.71981-02-08
Span12 days
Flares by day
1
2
3
9
3
3
3
8
8
1
1
4
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1981-02-05 | 21:12 | 21:21 | 37 | C8.7 | N13E70 | 2930 |
| 1981-02-06 | 00:40 | 00:42 | 49 | M1.1 | N12E68 | 2930 |
| 1981-02-06 | 21:58 | 22:00 | 17 | C4.1 | N12E58 | 2930 |
| 1981-02-07 | 16:41 | 16:41 | 5 | C5.5 | N13E49 | 2930 |
| 1981-02-07 | 18:30 | 18:35 | 26 | M3.5 | N13E48 | 2930 |
| 1981-02-07 | 21:50 | 22:32 | 101 | M1.9 | N12E46 | 2930 |
| 1981-02-08 | 01:12 | 01:12 | 11 | C5.2 | N12E45 | 2930 |
| 1981-02-08 | 01:32 | 01:40 | 30 | M2.3 | N13E44 | 2930 |
| 1981-02-08 | 03:28 | 03:30 | 22 | M3.7 | N13E42 | 2930 |
| 1981-02-08 | 06:54 | 06:56 | 18 | C8.1 | N13E42 | 2930 |
| 1981-02-08 | 09:41 | 09:42 | 6 | C5.7 | N13E41 | 2930 |
| 1981-02-08 | 10:38 | 10:42 | 11 | C5.1 | – | 2930 |
| 1981-02-08 | 16:20 | 17:09 | 69 | C2.1 | S12E36 | 2930 |
| 1981-02-08 | 18:04 | 18:12 | 22 | C9.1 | – | 2930 |
| 1981-02-08 | 19:47 | 19:49 | 8 | C1.8 | N13E34 | 2930 |
| 1981-02-09 | 06:47 | 06:50 | 37 | M1.2 | N11E27 | 2930 |
| 1981-02-09 | 10:01 | 10:05 | 8 | C5.5 | N13E25 | 2930 |
| 1981-02-09 | 15:51 | 15:55 | 22 | C5.3 | N12E24 | 2930 |
| 1981-02-10 | 02:22 | 02:23 | 9 | C4.4 | N09E12 | 2930 |
| 1981-02-10 | 05:51 | 05:58 | 25 | C4.4 | N10E12 | 2930 |
| 1981-02-10 | 10:30 | 10:32 | 56 | M1.8 | N08E18 | 2930 |
| 1981-02-11 | 02:25 | 04:02 | 144 | C3.7 | N11W02 | 2930 |
| 1981-02-11 | 09:42 | 09:44 | 18 | C2.9 | N11E00 | 2930 |
| 1981-02-11 | 16:10 | 16:25 | 80 | C4.4 | – | 2930 |
| 1981-02-12 | 06:25 | 06:28 | 13 | C5.5 | N10W14 | 2930 |
| 1981-02-12 | 09:03 | 09:20 | 25 | C3.2 | – | 2930 |
| 1981-02-12 | 09:29 | 09:32 | 29 | C7.2 | N10W16 | 2930 |
| 1981-02-12 | 09:46 | 10:04 | 57 | C7.5 | – | 2930 |
| 1981-02-12 | 10:47 | 10:50 | 5 | C9.6 | – | 2930 |
| 1981-02-12 | 15:22 | 15:32 | 19 | C3.8 | N11W15 | 2930 |
| 1981-02-12 | 17:29 | 17:34 | 9 | C3.5 | – | 2930 |
| 1981-02-12 | 18:08 | 18:12 | 10 | C2.3 | – | 2930 |
| 1981-02-13 | 00:37 | 00:45 | 30 | C5.6 | N12W21 | 2930 |
| 1981-02-13 | 03:07 | 03:11 | 9 | C2.9 | – | 2930 |
| 1981-02-13 | 03:45 | 03:46 | 8 | C1.8 | N11W27 | 2930 |
| 1981-02-13 | 15:26 | 15:30 | 13 | C2.1 | – | 2930 |
| 1981-02-13 | 17:00 | 17:06 | 10 | C2.5 | – | 2930 |
| 1981-02-13 | 19:09 | 19:12 | 5 | C2.5 | – | 2930 |
| 1981-02-13 | 19:29 | 19:38 | 16 | C6.9 | N09E37 | 2930 |
| 1981-02-13 | 21:57 | 22:21 | 33 | C4.1 | – | 2930 |
| 1981-02-14 | 18:16 | 18:24 | 18 | C4.7 | – | 2930 |
| 1981-02-15 | 18:52 | 19:05 | 28 | M1.0 | – | 2930 |
| 1981-02-16 | 00:39 | 00:47 | 14 | C1.9 | N11W65 | 2930 |
| 1981-02-16 | 02:40 | 02:41 | 7 | C2.4 | N12W62 | 2930 |
| 1981-02-16 | 05:47 | 05:47 | 28 | C3.9 | N12W63 | 2930 |
| 1981-02-16 | 08:09 | 08:09 | 6 | C1.9 | N11W66 | 2930 |
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 2930 produced 46 C+ flares between 1981-02-05 and 1981-02-16.