Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 6654
C14
M17
X1
LargestX1.01991-05-29
Span6 days
Flares by day
7
11
8
2
2
2
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-05-27 | 13:09 | 13:10 | 3 | C2.5 | N06E69 | 6654 |
| 1991-05-27 | 15:20 | 15:25 | 20 | C4.6 | N06E71 | 6654 |
| 1991-05-27 | 18:32 | 19:08 | 52 | C7.4 | N04E67 | 6654 |
| 1991-05-27 | 19:46 | 19:53 | 16 | C1.9 | N05E66 | 6654 |
| 1991-05-27 | 21:01 | 21:03 | 9 | C5.0 | N04E65 | 6654 |
| 1991-05-27 | 22:18 | 22:19 | 10 | C2.9 | N06E68 | 6654 |
| 1991-05-27 | 23:09 | 23:14 | 15 | M1.1 | N04E64 | 6654 |
| 1991-05-28 | 00:58 | 01:03 | 13 | C3.3 | N07E69 | 6654 |
| 1991-05-28 | 03:29 | 03:34 | 22 | M1.5 | N05E62 | 6654 |
| 1991-05-28 | 05:14 | 05:37 | 35 | M2.2 | N09E64 | 6654 |
| 1991-05-28 | 07:00 | 07:01 | 77 | M3.2 | N06E61 | 6654 |
| 1991-05-28 | 10:18 | 10:23 | 13 | M5.3 | N08E57 | 6654 |
| 1991-05-28 | 13:05 | 13:13 | 25 | M2.4 | N08E55 | 6654 |
| 1991-05-28 | 14:42 | 15:18 | 84 | M1.7 | N07E59 | 6654 |
| 1991-05-28 | 16:14 | 16:22 | 25 | M1.5 | N06E55 | 6654 |
| 1991-05-28 | 18:33 | 18:34 | 6 | C6.8 | N08E63 | 6654 |
| 1991-05-28 | 20:09 | 20:12 | 46 | C6.1 | N06E52 | 6654 |
| 1991-05-28 | 22:06 | 22:13 | 16 | M1.4 | N05E51 | 6654 |
| 1991-05-29 | 01:11 | 01:21 | 20 | C5.9 | N07E49 | 6654 |
| 1991-05-29 | 02:55 | 03:01 | 23 | M1.3 | N05E45 | 6654 |
| 1991-05-29 | 04:42 | 04:47 | 33 | M1.7 | N08E48 | 6654 |
| 1991-05-29 | 10:05 | 10:11 | 18 | C3.6 | N07E48 | 6654 |
| 1991-05-29 | 12:07 | 12:10 | 24 | M4.3 | N08E43 | 6654 |
| 1991-05-29 | 14:14 | 14:19 | 17 | C9.4 | N03E43 | 6654 |
| 1991-05-29 | 19:46 | 19:53 | 39 | C8.6 | N08E39 | 6654 |
| 1991-05-29 | 22:14 | 23:43 | 149 | X1.0 | N05E38 | 6654 |
| 1991-05-30 | 03:40 | 03:43 | 59 | M1.4 | N06E41 | 6654 |
| 1991-05-30 | 09:43 | 09:44 | 24 | M8.2 | N07E30 | 6654 |
| 1991-05-31 | 08:06 | 08:42 | 84 | M1.6 | N06E20 | 6654 |
| 1991-05-31 | 12:15 | 12:34 | 32 | C7.8 | N07E14 | 6654 |
| 1991-06-01 | 02:51 | 03:02 | 11 | M1.0 | N09E11 | 6654 |
| 1991-06-01 | 04:00 | 04:02 | 46 | M2.3 | N10W01 | 6654 |
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 6654 produced 32 C+ flares between 1991-05-27 and 1991-06-01.