Solar Flare WatchHome › Flare history › 2012
M9.0 solar flare on 2012-10-20
ClassM9.0NOAA report
Peak18:142012-10-20 UTC
Duration14 min
Peak flux9.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 8 / 1388 |
| Other M/X flares that day | 0 |
| M/X flares that month | 7 |
| Solar cycle | Cycle 24 |
Compared with the strongest flares of 2012
X5.4
X1.8
X1.7
X1.4
X1.3
X1.1
X1.1
M9.0
M8.7
M8.4
M7.9
M7.7
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.
← M5.5 2012-08-18M5.0 2012-10-22 →
About this page
A M9.0 flare that began 2012-10-20 18:05 UTC; No. 8 of 1,388 C-class-or-larger flares in 2012.