Solar Flare WatchHome › Flare history › 1991
M5.7 solar flare on 1991-11-30
ClassM5.7NOAA report
Peak03:491991-11-30 UTC
Duration7 min
Peak flux5.7e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 97 / 3297 |
| Other M/X flares that day | 2 |
| M/X flares that month | 29 |
| Solar cycle | Cycle 22 |
| Active region | AR 6946 (14 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 |
|---|---|---|---|---|---|---|
| 09:51 | 09:57 | 16 | M1.5 | – | – | |
| 19:25 | 19:36 | 37 | M1.0 | S07E38 | 6946 |
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 1991-11-15X2.2 1991-12-03 →
About this page
A M5.7 flare that began 1991-11-30 03:44 UTC; No. 97 of 3,297 C-class-or-larger flares in 1991.