Solar Flare WatchHome › Flare history › 1991
M7.4 solar flare on 1991-08-03
ClassM7.4NOAA report
Peak22:341991-08-03 UTC
Duration29 min
Peak flux7.4e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 68 / 3297 |
| Other M/X flares that day | 3 |
| M/X flares that month | 35 |
| Solar cycle | Cycle 22 |
| Position on disk | N23W11 |
| Active region | AR 6757 (37 flares) |
Compared with the strongest flares of 1991
X12.0
X12.0
X12.0
X12.0
X12.0
X10.0
X10.0
X9.4
X7.1
X6.1
X5.5
X5.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 01:21 | 01:23 | 8 | M2.9 | N23W02 | 6757 | |
| 03:25 | 04:07 | 65 | M1.4 | N17W05 | 6757 | |
| 18:57 | 18:59 | 39 | M1.6 | N21W13 | 6757 |
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.
← X1.5 1991-08-02M6.7 1991-08-16 →
About this page
A M7.4 flare that began 1991-08-03 22:26 UTC; No. 68 of 3,297 C-class-or-larger flares in 1991.