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X1.2 solar flare on 1981-11-12
ClassX1.2NOAA report
Peak16:061981-11-12 UTC
Duration50 min
Peak flux1.2e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 320 / 491 |
| Rank in year | 28 / 4022 |
| Other M/X flares that day | 3 |
| M/X flares that month | 39 |
| Solar cycle | Cycle 21 |
| Active region | AR 3451 (46 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 |
|---|---|---|---|---|---|---|
| 01:06 | 01:18 | 33 | M2.0 | – | – | |
| 08:25 | 09:56 | 115 | M1.1 | – | – | |
| 18:11 | 18:13 | 22 | M1.9 | N16E23 | 3456 |
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.
← M6.6 1981-11-07M5.0 1981-11-14 →
About this page
A X1.2 flare that began 1981-11-12 15:41 UTC; No. 28 of 4,022 C-class-or-larger flares in 1981.