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M7.5 solar flare on 1981-10-12
ClassM7.5NOAA report
Peak04:371981-10-12 UTC
Duration28 min
Peak flux7.5e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 54 / 4022 |
| Other M/X flares that day | 6 |
| M/X flares that month | 43 |
| Solar cycle | Cycle 21 |
Compared with the strongest flares of 1981
X5.9
X5.5
X4.0
X3.6
X3.5
X3.1
X3.0
X2.7
X2.6
X2.5
X2.4
X2.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 05:10 | 05:17 | 17 | M1.0 | – | – | |
| 06:22 | 06:36 | 55 | X3.1 | – | 3390 | |
| 10:37 | 11:01 | 51 | M9.2 | S16E32 | 3390 | |
| 11:47 | 13:21 | 476 | M1.1 | S16E24 | 3390 | |
| 14:42 | 14:42 | 10 | M3.1 | S11E78 | 3403 | |
| 20:40 | 21:15 | 55 | M1.0 | S15E80 | 3403 |
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.
← X3.6 1981-10-07X3.1 1981-10-12 →
About this page
A M7.5 flare that began 1981-10-12 04:29 UTC; No. 54 of 4,022 C-class-or-larger flares in 1981.