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M5.1 solar flare on 1981-04-08
ClassM5.1NOAA report
Peak16:531981-04-08 UTC
Duration54 min
Peak flux5.1e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 69 / 4022 |
| Other M/X flares that day | 3 |
| M/X flares that month | 87 |
| Solar cycle | Cycle 21 |
| Active region | AR 3025 (7 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 |
|---|---|---|---|---|---|---|
| 12:35 | 12:38 | 37 | M1.4 | N10E78 | 3035 | |
| 13:17 | 13:26 | 20 | M1.1 | – | 3035 | |
| 16:23 | 16:50 | 306 | M1.8 | N11W03 | 3025 |
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.
← M8.2 1981-04-04X1.1 1981-04-10 →
About this page
A M5.1 flare that began 1981-04-08 16:35 UTC; No. 69 of 4,022 C-class-or-larger flares in 1981.