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Solar flares from active region 6487
C12
M6
X0
LargestM5.31991-02-07
Span10 days
Flares by day
2
2
1
2
6
3
1
1
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-02-06 | 07:49 | 08:21 | 109 | M1.1 | N15E62 | 6487 |
| 1991-02-06 | 21:30 | 21:58 | 43 | M1.3 | N15E53 | 6487 |
| 1991-02-07 | 08:48 | 08:52 | 27 | M1.0 | N14E49 | 6487 |
| 1991-02-07 | 21:14 | 21:16 | 20 | M5.3 | N16E43 | 6487 |
| 1991-02-08 | 20:09 | 21:28 | 144 | C3.3 | N14E27 | 6487 |
| 1991-02-09 | 00:41 | 00:56 | 40 | C3.0 | N11E28 | 6487 |
| 1991-02-09 | 23:48 | 23:48 | 5 | C2.1 | N13E14 | 6487 |
| 1991-02-10 | 00:43 | 00:52 | 21 | C1.7 | N11E12 | 6487 |
| 1991-02-10 | 01:13 | 01:13 | 12 | C2.7 | N13E14 | 6487 |
| 1991-02-10 | 10:35 | 10:36 | 18 | C1.2 | N13E10 | 6487 |
| 1991-02-10 | 14:01 | 14:11 | 19 | C1.5 | N15E05 | 6487 |
| 1991-02-10 | 19:44 | 19:49 | 28 | C3.1 | N14E04 | 6487 |
| 1991-02-10 | 20:40 | 20:50 | 31 | C3.7 | N13E02 | 6487 |
| 1991-02-11 | 01:06 | 01:57 | 83 | M1.1 | N14E01 | 6487 |
| 1991-02-11 | 05:53 | 05:56 | 12 | C2.7 | N13W01 | 6487 |
| 1991-02-11 | 09:13 | 09:16 | 49 | C2.3 | N11W04 | 6487 |
| 1991-02-14 | 12:31 | 12:33 | 49 | M3.6 | N10W45 | 6487 |
| 1991-02-15 | 11:46 | 11:46 | 5 | C4.6 | N09W60 | 6487 |
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 6487 produced 18 C+ flares between 1991-02-06 and 1991-02-15.