Solar Flare WatchHome › Flare history › 1991
M8.5 solar flare on 1991-12-22
ClassM8.5NOAA report
Peak17:071991-12-22 UTC
Duration104 min
Peak flux8.5e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 63 / 3297 |
| Other M/X flares that day | 1 |
| M/X flares that month | 94 |
| Solar cycle | Cycle 22 |
| Position on disk | S16E78 |
| Active region | AR 6985 (21 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 |
|---|---|---|---|---|---|---|
| 09:11 | 09:20 | 86 | M1.4 | – | – |
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.
← X3.5 1991-12-20X1.4 1991-12-24 →
About this page
A M8.5 flare that began 1991-12-22 16:49 UTC; No. 63 of 3,297 C-class-or-larger flares in 1991.