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Solar flares from active region 6537
C3
M3
X1
LargestX1.41991-03-05
Span7 days
Flares by day
1
2
1
3
All flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-03-05 | 17:16 | 17:18 | 32 | X1.4 | S09E69 | 6537 |
| 1991-03-07 | 09:27 | 09:29 | 32 | M2.9 | S10E45 | 6537 |
| 1991-03-07 | 17:16 | 17:19 | 20 | M2.9 | S11E40 | 6537 |
| 1991-03-09 | 06:09 | 06:46 | 91 | M1.4 | S16E39 | 6537 |
| 1991-03-11 | 04:05 | 04:06 | 14 | C1.8 | S08W01 | 6537 |
| 1991-03-11 | 08:42 | 08:47 | 16 | C5.3 | S08W04 | 6537 |
| 1991-03-11 | 22:15 | 22:20 | 51 | C8.0 | S07W13 | 6537 |
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 6537 produced 7 C+ flares between 1991-03-05 and 1991-03-11.