Solar Flare WatchHome › Flare history › 1981
M8.3 solar flare on 1981-02-19
ClassM8.3NOAA report
Peak03:471981-02-19 UTC
Duration28 min
Peak flux8.3e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 48 / 4022 |
| Other M/X flares that day | 2 |
| M/X flares that month | 44 |
| Solar cycle | Cycle 21 |
| Position on disk | S20E90 |
| Active region | AR 2953 (2 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 |
|---|---|---|---|---|---|---|
| 01:40 | 03:12 | 144 | M2.0 | N18W36 | 2941 | |
| 10:45 | 10:52 | 24 | M2.0 | – | – |
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.
← X1.0 1981-02-17X2.4 1981-02-20 →
About this page
A M8.3 flare that began 1981-02-19 03:47 UTC; No. 48 of 4,022 C-class-or-larger flares in 1981.