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X2.5 solar flare on 1981-04-10
ClassX2.5NOAA report
Peak17:031981-04-10 UTC
Duration32 min
Peak flux2.5e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 146 / 491 |
| Rank in year | 10 / 4022 |
| Other M/X flares that day | 4 |
| M/X flares that month | 87 |
| Solar cycle | Cycle 21 |
| Position on disk | N07W35 |
| Active region | AR 3025 (7 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 |
|---|---|---|---|---|---|---|
| 04:14 | 04:18 | 138 | M2.1 | N06W28 | 3025 | |
| 10:59 | 11:14 | 23 | X1.1 | N11E53 | 3035 | |
| 14:27 | 00:00 | 573 | M2.0 | N13E47 | 3035 | |
| 22:05 | 22:11 | 13 | M1.0 | – | – |
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.
← X1.1 1981-04-10M5.8 1981-04-12 →
About this page
A X2.5 flare that began 1981-04-10 16:32 UTC; No. 10 of 4,022 C-class-or-larger flares in 1981.