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X3.1 solar flare on 1981-10-12
ClassX3.1NOAA report
Peak06:361981-10-12 UTC
Duration55 min
Peak flux3.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 105 / 491 |
| Rank in year | 6 / 4022 |
| Other M/X flares that day | 6 |
| M/X flares that month | 43 |
| Solar cycle | Cycle 21 |
| Active region | AR 3390 (60 flares) |
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 |
|---|---|---|---|---|---|---|
| 04:29 | 04:37 | 28 | M7.5 | – | – | |
| 05:10 | 05:17 | 17 | M1.0 | – | – | |
| 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.
← M7.5 1981-10-12M9.2 1981-10-12 →
About this page
A X3.1 flare that began 1981-10-12 06:22 UTC; No. 6 of 4,022 C-class-or-larger flares in 1981.