Solar Flare WatchHome › Flare history › 1981
M5.8 solar flare on 1981-04-12
ClassM5.8NOAA report
Peak21:461981-04-12 UTC
Duration29 min
Peak flux5.8e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 61 / 4022 |
| Other M/X flares that day | 6 |
| M/X flares that month | 87 |
| Solar cycle | Cycle 21 |
| Position on disk | N13E17 |
| Active region | AR 3035 (35 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 |
|---|---|---|---|---|---|---|
| 01:30 | 01:35 | 28 | M2.0 | N14E34 | 3035 | |
| 03:01 | 03:12 | 34 | M1.4 | N13E32 | 3035 | |
| 07:46 | 07:57 | 18 | M1.0 | – | 3027 | |
| 08:16 | 09:09 | 87 | M2.3 | N13E29 | 3035 | |
| 12:40 | 12:50 | 21 | M1.1 | – | 3035 | |
| 19:43 | 20:07 | 31 | M1.1 | – | – |
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.
← X2.5 1981-04-10M5.5 1981-04-18 →
About this page
A M5.8 flare that began 1981-04-12 21:39 UTC; No. 61 of 4,022 C-class-or-larger flares in 1981.