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X2.2 solar flare on 2015-03-11
ClassX2.2NOAA report
Peak16:222015-03-11 UTC
Duration18 min
Peak flux2.2e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 183 / 491 |
| Rank in year | 2 / 1407 |
| Other M/X flares that day | 3 |
| M/X flares that month | 27 |
| Solar cycle | Cycle 24 |
| Position on disk | S17E21 |
| Active region | AR 12297 (72 flares) |
Compared with the strongest flares of 2015
X2.7
X2.2
M9.2
M8.2
M7.9
M6.6
M5.8
M5.6
M5.6
M5.5
M5.1
M4.9
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 07:10 | 07:18 | 33 | M1.8 | S16E26 | 12297 | |
| 07:51 | 07:57 | 12 | M2.6 | S16E26 | 12297 | |
| 18:37 | 18:51 | 20 | M1.0 | S16E18 | 12297 |
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.
← M5.1 2015-03-10X2.7 2015-05-05 →
About this page
A X2.2 flare that began 2015-03-11 16:11 UTC; No. 2 of 1,407 C-class-or-larger flares in 2015.