Solar Flare WatchHome › Flare history › Region ranking
Solar flares from active region 6466
C11
M4
X1
LargestX1.01991-01-30
Span11 days
Flares by day
1
3
1
3
1
2
3
2
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-01-22 | 17:58 | 18:00 | 21 | C9.8 | S08E67 | 6466 |
| 1991-01-23 | 08:12 | 08:19 | 26 | C7.4 | S12E63 | 6466 |
| 1991-01-23 | 10:40 | 10:41 | 29 | C3.1 | S07E61 | 6466 |
| 1991-01-23 | 22:48 | 22:49 | 9 | C2.8 | S08E52 | 6466 |
| 1991-01-24 | 12:24 | 12:26 | 16 | C4.5 | S09E46 | 6466 |
| 1991-01-25 | 10:39 | 11:11 | 130 | M1.4 | S06E30 | 6466 |
| 1991-01-25 | 13:17 | 13:29 | 69 | M2.4 | S08E30 | 6466 |
| 1991-01-25 | 19:34 | 21:02 | 151 | C4.6 | S09E21 | 6466 |
| 1991-01-26 | 18:43 | 18:56 | 37 | C4.4 | S11E16 | 6466 |
| 1991-01-28 | 01:30 | 01:42 | 148 | M1.7 | S09W04 | 6466 |
| 1991-01-28 | 09:11 | 09:32 | 51 | C5.1 | S09W07 | 6466 |
| 1991-01-30 | 07:38 | 08:06 | 48 | C4.9 | S10W29 | 6466 |
| 1991-01-30 | 08:49 | 09:00 | 96 | X1.0 | S08W34 | 6466 |
| 1991-01-30 | 14:07 | 14:45 | 51 | M1.2 | S10W39 | 6466 |
| 1991-02-01 | 00:36 | 00:52 | 155 | C9.2 | S04W55 | 6466 |
| 1991-02-01 | 23:34 | 23:37 | 15 | C4.0 | S10W65 | 6466 |
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 6466 produced 16 C+ flares between 1991-01-22 and 1991-02-01.