Solar Flare WatchHome › Flare history › 1981
M8.3 solar flare on 1981-04-03
ClassM8.3NOAA report
Peak10:151981-04-03 UTC
Duration125 min
Peak flux8.3e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 49 / 4022 |
| Other M/X flares that day | 5 |
| M/X flares that month | 87 |
| Solar cycle | Cycle 21 |
| Active region | AR 2999 (23 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 |
|---|---|---|---|---|---|---|
| 01:59 | 02:11 | 36 | M1.4 | S43W72 | 2999 | |
| 11:53 | 11:58 | 12 | M1.5 | – | – | |
| 17:53 | 18:26 | 35 | M1.1 | – | 2999 | |
| 18:40 | 18:45 | 15 | M1.5 | – | 2999 | |
| 23:25 | 23:52 | 56 | M2.4 | – | 3022 |
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.
← X2.2 1981-04-02X1.9 1981-04-04 →
About this page
A M8.3 flare that began 1981-04-03 09:12 UTC; No. 49 of 4,022 C-class-or-larger flares in 1981.