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X1.2 solar flare on 1981-04-26
ClassX1.2NOAA report
Peak12:351981-04-26 UTC
Duration199 min
Peak flux1.2e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 318 / 491 |
| Rank in year | 26 / 4022 |
| Other M/X flares that day | 4 |
| M/X flares that month | 87 |
| Solar cycle | Cycle 21 |
| Active region | AR 3049 (30 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 |
|---|---|---|---|---|---|---|
| 06:05 | 06:16 | 35 | M1.1 | N17W76 | 3049 | |
| 07:16 | 07:19 | 24 | M4.7 | N04E57 | 3067 | |
| 10:57 | 11:51 | 231 | M5.1 | N12W74 | 3049 | |
| 17:49 | 17:57 | 39 | M2.2 | N04E47 | 3067 |
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.
← M5.1 1981-04-26X5.5 1981-04-27 →
About this page
A X1.2 flare that began 1981-04-26 10:57 UTC; No. 26 of 4,022 C-class-or-larger flares in 1981.