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X1.5 solar flare on 2011-03-09
ClassX1.5NOAA report
Peak23:232011-03-09 UTC
Duration16 min
Peak flux1.5e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 275 / 491 |
| Rank in year | 7 / 1319 |
| Other M/X flares that day | 2 |
| M/X flares that month | 22 |
| Solar cycle | Cycle 24 |
| Active region | AR 11166 (32 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
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.
← M5.3 2011-03-08M9.3 2011-07-30 →
About this page
A X1.5 flare that began 2011-03-09 23:13 UTC; No. 7 of 1,319 C-class-or-larger flares in 2011.