Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 6615
C43
M7
X0
LargestM3.41991-05-11
Span12 days
Flares by day
3
1
5
5
3
4
6
5
9
2
4
3
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-05-01 | 00:08 | 00:20 | 61 | C8.2 | S15E64 | 6615 |
| 1991-05-01 | 18:16 | 18:21 | 14 | C1.8 | S14E57 | 6615 |
| 1991-05-01 | 19:45 | 19:48 | 34 | C1.8 | S14E56 | 6615 |
| 1991-05-02 | 02:13 | 02:14 | 18 | C2.1 | S14E55 | 6615 |
| 1991-05-03 | 05:47 | 05:51 | 25 | C2.9 | S16E32 | 6615 |
| 1991-05-03 | 14:40 | 15:14 | 107 | C1.7 | S13E26 | 6615 |
| 1991-05-03 | 18:04 | 18:38 | 85 | C4.5 | S13E23 | 6615 |
| 1991-05-03 | 22:30 | 22:36 | 37 | C5.6 | S15E28 | 6615 |
| 1991-05-03 | 23:47 | 23:49 | 13 | C3.6 | S15E20 | 6615 |
| 1991-05-04 | 06:02 | 06:04 | 10 | C1.2 | S11E21 | 6615 |
| 1991-05-04 | 06:20 | 06:27 | 13 | C3.0 | S12E19 | 6615 |
| 1991-05-04 | 08:41 | 09:21 | 84 | C1.6 | S08E16 | 6615 |
| 1991-05-04 | 15:37 | 15:41 | 24 | C1.8 | S11E10 | 6615 |
| 1991-05-04 | 23:19 | 23:19 | 15 | C1.5 | S12E09 | 6615 |
| 1991-05-05 | 05:24 | 05:28 | 16 | C1.9 | S09E04 | 6615 |
| 1991-05-05 | 07:53 | 07:56 | 7 | C1.2 | S12E04 | 6615 |
| 1991-05-05 | 20:23 | 20:46 | 84 | M1.1 | S12E07 | 6615 |
| 1991-05-06 | 04:30 | 04:35 | 36 | C3.1 | S10W06 | 6615 |
| 1991-05-06 | 16:12 | 16:13 | 5 | C1.8 | S09W16 | 6615 |
| 1991-05-06 | 16:58 | 17:00 | 11 | C4.8 | S05W16 | 6615 |
| 1991-05-06 | 23:21 | 23:22 | 10 | C7.8 | S10W15 | 6615 |
| 1991-05-07 | 00:01 | 00:34 | 113 | M2.3 | S07W22 | 6615 |
| 1991-05-07 | 07:40 | 07:41 | 50 | C4.5 | S11W21 | 6615 |
| 1991-05-07 | 09:58 | 10:37 | 75 | M1.4 | S11W27 | 6615 |
| 1991-05-07 | 14:45 | 14:47 | 46 | C5.2 | S08W29 | 6615 |
| 1991-05-07 | 17:42 | 18:08 | 40 | C2.4 | S31W33 | 6615 |
| 1991-05-07 | 22:38 | 22:42 | 21 | C3.2 | S08W35 | 6615 |
| 1991-05-08 | 00:14 | 00:15 | 22 | C2.3 | S10W31 | 6615 |
| 1991-05-08 | 01:20 | 01:21 | 9 | C3.9 | S12W33 | 6615 |
| 1991-05-08 | 02:16 | 02:17 | 13 | C4.7 | S10W34 | 6615 |
| 1991-05-08 | 07:21 | 08:13 | 135 | C2.8 | S11W41 | 6615 |
| 1991-05-08 | 22:34 | 23:01 | 92 | C4.0 | S08W48 | 6615 |
| 1991-05-09 | 00:40 | 00:40 | 7 | C1.5 | S07W52 | 6615 |
| 1991-05-09 | 01:59 | 02:01 | 17 | C3.5 | S06W52 | 6615 |
| 1991-05-09 | 03:38 | 03:40 | 10 | C5.6 | S09W49 | 6615 |
| 1991-05-09 | 08:33 | 08:42 | 62 | C4.3 | S09W56 | 6615 |
| 1991-05-09 | 10:54 | 10:54 | 10 | C4.1 | S09W54 | 6615 |
| 1991-05-09 | 12:03 | 12:18 | 17 | C7.9 | S09W54 | 6615 |
| 1991-05-09 | 12:33 | 12:36 | 10 | C8.0 | S09W54 | 6615 |
| 1991-05-09 | 17:45 | 17:47 | 12 | C5.9 | S10W56 | 6615 |
| 1991-05-09 | 22:35 | 22:35 | 5 | C1.6 | S08W65 | 6615 |
| 1991-05-10 | 19:06 | 19:46 | 95 | C5.9 | S08W71 | 6615 |
| 1991-05-10 | 19:44 | 19:45 | 17 | M1.5 | S10W69 | 6615 |
| 1991-05-11 | 05:08 | 05:16 | 16 | C2.8 | S05W80 | 6615 |
| 1991-05-11 | 08:02 | 08:14 | 22 | M1.4 | – | 6615 |
| 1991-05-11 | 13:21 | 13:22 | 23 | M3.4 | S08W80 | 6615 |
| 1991-05-11 | 15:19 | 15:24 | 9 | M1.6 | S08W83 | 6615 |
| 1991-05-12 | 02:37 | 02:37 | 9 | C6.5 | S08W86 | 6615 |
| 1991-05-12 | 07:18 | 07:21 | 7 | C3.0 | S10W84 | 6615 |
| 1991-05-12 | 08:02 | 08:04 | 10 | C5.0 | S09W82 | 6615 |
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 6615 produced 50 C+ flares between 1991-05-01 and 1991-05-12.