Solar Flare WatchHome › Flare history › 1991
M9.1 solar flare on 1991-11-02
ClassM9.1NOAA report
Peak06:471991-11-02 UTC
Duration60 min
Peak flux9.1e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 60 / 3297 |
| Other M/X flares that day | 2 |
| M/X flares that month | 29 |
| Solar cycle | Cycle 22 |
| Position on disk | S13W61 |
| Active region | AR 6891 (81 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 |
|---|---|---|---|---|---|---|
| 11:27 | 11:51 | 38 | M3.8 | N15W49 | 6893 | |
| 16:19 | 16:35 | 110 | M4.8 | S07W69 | 6891 |
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.
← X2.5 1991-10-30X1.1 1991-11-09 →
About this page
A M9.1 flare that began 1991-11-02 06:27 UTC; No. 60 of 3,297 C-class-or-larger flares in 1991.