Solar Flare WatchHome › Flare history › 1981
X5.9 solar flare on 1981-04-24
ClassX5.9NOAA report
Peak14:111981-04-24 UTC
Duration229 min
Peak flux5.9e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 41 / 491 |
| Rank in year | 1 / 4022 |
| Other M/X flares that day | 2 |
| M/X flares that month | 87 |
| Solar cycle | Cycle 21 |
| Position on disk | N18W50 |
| 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
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.
← X1.4 1981-04-24M5.1 1981-04-26 →
About this page
A X5.9 flare that began 1981-04-24 13:46 UTC; No. 1 of 4,022 C-class-or-larger flares in 1981.