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Solar flares from active region 2993
C24
M4
X0
LargestM4.31981-04-01
Span15 days
Flares by day
2
1
4
4
2
3
4
2
1
3
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1981-03-18 | 18:29 | 18:40 | 14 | C2.6 | N15E75 | 2993 |
| 1981-03-18 | 19:48 | 19:53 | 50 | C5.1 | N11E72 | 2993 |
| 1981-03-20 | 00:11 | 00:12 | 4 | C3.9 | N13E62 | 2993 |
| 1981-03-21 | 00:27 | 00:29 | 10 | C4.3 | N17E57 | 2993 |
| 1981-03-21 | 02:31 | 02:35 | 24 | C6.6 | N16E54 | 2993 |
| 1981-03-21 | 03:42 | 03:46 | 6 | C6.3 | N17E53 | 2993 |
| 1981-03-21 | 06:33 | 06:36 | 15 | C7.4 | N13E53 | 2993 |
| 1981-03-22 | 00:42 | 00:45 | 5 | C2.5 | – | 2993 |
| 1981-03-22 | 03:23 | 03:24 | 10 | C1.8 | N17E40 | 2993 |
| 1981-03-22 | 20:43 | 20:45 | 25 | C6.8 | N17E29 | 2993 |
| 1981-03-22 | 21:58 | 22:04 | 15 | C6.3 | N16E29 | 2993 |
| 1981-03-24 | 06:22 | 06:26 | 12 | C6.4 | N05E03 | 2993 |
| 1981-03-24 | 21:18 | 22:32 | 127 | C3.0 | N09W07 | 2993 |
| 1981-03-25 | 00:59 | 01:02 | 22 | C3.3 | N11W07 | 2993 |
| 1981-03-25 | 02:53 | 03:02 | 30 | C3.5 | N12W07 | 2993 |
| 1981-03-25 | 05:06 | 05:10 | 16 | C5.6 | N12W06 | 2993 |
| 1981-03-26 | 14:42 | 14:48 | 30 | M1.2 | N17W19 | 2993 |
| 1981-03-26 | 18:07 | 18:15 | 27 | M1.3 | N17W21 | 2993 |
| 1981-03-26 | 21:34 | 21:34 | 4 | C2.3 | N18W13 | 2993 |
| 1981-03-26 | 23:44 | 23:52 | 14 | C3.7 | N13W30 | 2993 |
| 1981-03-27 | 02:45 | 02:49 | 33 | C7.9 | N17W26 | 2993 |
| 1981-03-27 | 16:27 | 16:29 | 27 | C3.3 | N14W39 | 2993 |
| 1981-03-28 | 15:03 | 15:08 | 59 | C6.3 | N15W47 | 2993 |
| 1981-03-29 | 10:55 | 11:00 | 20 | C4.5 | N60W18 | 2993 |
| 1981-03-29 | 16:06 | 16:11 | 27 | C3.4 | N17W67 | 2993 |
| 1981-03-29 | 18:06 | 18:08 | 14 | C3.3 | N16W63 | 2993 |
| 1981-03-30 | 00:49 | 00:49 | 99 | M3.5 | N13W74 | 2993 |
| 1981-04-01 | 14:05 | 14:37 | 94 | M4.3 | – | 2993 |
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 2993 produced 28 C+ flares between 1981-03-18 and 1981-04-01.