Solar Flare WatchHome › Flare history › 1988
M5.7 solar flare on 1988-09-28
ClassM5.7NOAA report
Peak23:081988-09-28 UTC
Duration74 min
Peak flux5.7e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 30 / 1845 |
| Other M/X flares that day | 0 |
| M/X flares that month | 10 |
| Solar cycle | Cycle 22 |
| Position on disk | S27E48 |
| Active region | AR 5171 (38 flares) |
Compared with the strongest flares of 1988
X5.6
X4.7
X3.2
X2.5
X2.4
X1.6
X1.4
X1.4
X1.3
X1.2
X1.1
X1.1
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.
← M7.9 1988-09-27X3.2 1988-10-03 →
About this page
A M5.7 flare that began 1988-09-28 22:55 UTC; No. 30 of 1,845 C-class-or-larger flares in 1988.