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M5.7 solar flare on 1981-08-28
ClassM5.7NOAA report
Peak03:461981-08-28 UTC
Duration13 min
Peak flux5.7e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 63 / 4022 |
| Other M/X flares that day | 3 |
| M/X flares that month | 58 |
| Solar cycle | Cycle 21 |
| Position on disk | N10W44 |
| Active region | AR 3293 (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 |
|---|---|---|---|---|---|---|
| 14:52 | 15:09 | 46 | M1.2 | S12E49 | 3300 | |
| 18:48 | 18:53 | 7 | M1.8 | S12E46 | 3300 | |
| 19:20 | 19:24 | 13 | M1.2 | S09W42 | 3287 |
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.
← M7.6 1981-08-27M7.4 1981-09-03 →
About this page
A M5.7 flare that began 1981-08-28 03:36 UTC; No. 63 of 4,022 C-class-or-larger flares in 1981.