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X1.4 solar flare on 1981-02-24
ClassX1.4NOAA report
Peak19:371981-02-24 UTC
Duration98 min
Peak flux1.4e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 278 / 491 |
| Rank in year | 23 / 4022 |
| Other M/X flares that day | 4 |
| M/X flares that month | 44 |
| Solar cycle | Cycle 21 |
| Position on disk | S14E72 |
| Active region | AR 2958 (20 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 |
|---|---|---|---|---|---|---|
| 00:13 | 00:15 | 19 | M5.2 | S16E81 | 2958 | |
| 10:47 | 11:05 | 48 | M1.0 | – | – | |
| 12:02 | 12:26 | 62 | X2.3 | – | 2954 | |
| 18:01 | 18:22 | 72 | M1.1 | S19E75 | 2958 |
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.
← X2.3 1981-02-24X1.8 1981-02-26 →
About this page
A X1.4 flare that began 1981-02-24 19:31 UTC; No. 23 of 4,022 C-class-or-larger flares in 1981.