Solar Flare WatchHome › Flare history › 1980
M8.0 solar flare on 1980-07-21
ClassM8.0NOAA report
Peak03:001980-07-21 UTC
Duration28 min
Peak flux8.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 28 / 2460 |
| Other M/X flares that day | 0 |
| M/X flares that month | 22 |
| Solar cycle | Cycle 21 |
| Active region | AR 2562 (38 flares) |
Compared with the strongest flares of 1980
X9.0
X4.4
X3.9
X3.3
X3.3
X3.0
X2.7
X2.6
X2.5
X2.5
X2.2
X1.9
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.
← X1.1 1980-07-14M8.9 1980-07-23 →
About this page
A M8.0 flare that began 1980-07-21 02:52 UTC; No. 28 of 2,460 C-class-or-larger flares in 1980.