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X2.6 solar flare on 1981-08-12
ClassX2.6NOAA report
Peak06:261981-08-12 UTC
Duration56 min
Peak flux2.6e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 134 / 491 |
| Rank in year | 9 / 4022 |
| Other M/X flares that day | 5 |
| M/X flares that month | 58 |
| Solar cycle | Cycle 21 |
| Position on disk | S10W28 |
| Active region | AR 3257 (82 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 |
|---|---|---|---|---|---|---|
| 00:44 | 00:59 | 89 | M1.0 | S12W29 | 3257 | |
| 02:21 | 02:34 | 43 | M2.2 | S10W27 | 3257 | |
| 10:23 | 10:28 | 8 | M1.0 | – | – | |
| 20:43 | 21:16 | 125 | M2.7 | S10W37 | 3257 | |
| 22:25 | 22:28 | 31 | M1.4 | S13E75 | 3266 |
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.
← M7.2 1981-08-03M5.9 1981-08-13 →
About this page
A X2.6 flare that began 1981-08-12 06:24 UTC; No. 9 of 4,022 C-class-or-larger flares in 1981.