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X6.9 solar flare on 2011-08-09
ClassX6.9NOAA report
Peak08:052011-08-09 UTC
Duration20 min
Peak flux6.9e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 35 / 491 |
| Rank in year | 1 / 1319 |
| Other M/X flares that day | 1 |
| M/X flares that month | 8 |
| Solar cycle | Cycle 24 |
| Active region | AR 11263 (39 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 |
|---|---|---|---|---|---|---|
| 03:19 | 03:54 | 49 | M2.5 | – | 11263 |
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.
← M9.3 2011-08-04M5.3 2011-09-06 →
About this page
A X6.9 flare that began 2011-08-09 07:48 UTC; No. 1 of 1,319 C-class-or-larger flares in 2011.