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M6.6 solar flare on 2011-02-18
ClassM6.6NOAA report
Peak10:112011-02-18 UTC
Duration20 min
Peak flux6.6e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 15 / 1319 |
| Other M/X flares that day | 4 |
| M/X flares that month | 14 |
| Solar cycle | Cycle 24 |
| Active region | AR 11158 (62 flares) |
Compared with the strongest flares of 2011
X6.9
X2.2
X2.1
X1.9
X1.9
X1.8
X1.5
X1.4
M9.3
M9.3
M7.4
M7.1
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 10:23 | 10:26 | 14 | M1.0 | – | 11162 | |
| 12:59 | 13:03 | 7 | M1.4 | – | 11158 | |
| 14:00 | 14:08 | 15 | M1.0 | – | 11162 | |
| 20:56 | 21:04 | 18 | M1.3 | – | 11162 |
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.
← X2.2 2011-02-15M5.3 2011-03-08 →
About this page
A M6.6 flare that began 2011-02-18 09:55 UTC; No. 15 of 1,319 C-class-or-larger flares in 2011.