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Solar flares from active region 6580
C19
M4
X0
LargestM1.81991-04-16
Span12 days
Flares by day
2
5
1
1
1
2
1
7
1
2
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-04-07 | 14:07 | 14:09 | 17 | C3.6 | N30E72 | 6580 |
| 1991-04-07 | 20:07 | 20:25 | 39 | C3.1 | N30E71 | 6580 |
| 1991-04-08 | 08:24 | 08:26 | 26 | C3.3 | N30E64 | 6580 |
| 1991-04-08 | 09:49 | 09:50 | 3 | C2.1 | N31E63 | 6580 |
| 1991-04-08 | 10:18 | 10:20 | 9 | C1.9 | N31E63 | 6580 |
| 1991-04-08 | 11:26 | 11:29 | 8 | C1.8 | N31E62 | 6580 |
| 1991-04-08 | 14:58 | 15:04 | 49 | C4.1 | N29E61 | 6580 |
| 1991-04-09 | 15:28 | 15:40 | 39 | C7.4 | N30E47 | 6580 |
| 1991-04-10 | 15:13 | 15:16 | 14 | M1.4 | N27E35 | 6580 |
| 1991-04-11 | 02:52 | 03:17 | 72 | M1.2 | N29E26 | 6580 |
| 1991-04-13 | 00:25 | 00:29 | 10 | C4.8 | N03W29 | 6580 |
| 1991-04-13 | 01:41 | 01:50 | 24 | C8.5 | N03W29 | 6580 |
| 1991-04-15 | 00:41 | 00:44 | 10 | C4.3 | N29W23 | 6580 |
| 1991-04-16 | 02:51 | 02:53 | 5 | C5.9 | N29W35 | 6580 |
| 1991-04-16 | 03:06 | 03:08 | 11 | M1.1 | N29W35 | 6580 |
| 1991-04-16 | 06:03 | 06:05 | 7 | M1.8 | N29W36 | 6580 |
| 1991-04-16 | 08:55 | 08:56 | 3 | C6.5 | N29W37 | 6580 |
| 1991-04-16 | 14:17 | 14:25 | 23 | C5.9 | N28W44 | 6580 |
| 1991-04-16 | 14:45 | 14:49 | 28 | C4.9 | N28W45 | 6580 |
| 1991-04-16 | 18:50 | 18:57 | 30 | C3.3 | N28W46 | 6580 |
| 1991-04-17 | 22:35 | 22:41 | 17 | C4.1 | N27W60 | 6580 |
| 1991-04-18 | 00:44 | 00:47 | 15 | C4.3 | N27W58 | 6580 |
| 1991-04-18 | 06:40 | 06:43 | 13 | C3.4 | N29W64 | 6580 |
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 6580 produced 23 C+ flares between 1991-04-07 and 1991-04-18.