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X2.1 solar flare on 2017-09-07
ClassX2.1GOES-16 science data
Peak14:362017-09-07 UTC
Duration40 min
Peak flux2.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (since Jun 2017) | 32 / 108 |
| Rank in year | 4 / 415 |
| Other M/X flares that day | 4 |
| M/X flares that month | 39 |
| Solar cycle | Cycle 24 |
Compared with the strongest flares of 2017
X14.6
X12.9
X3.2
X2.1
X1.2
X1.2
M8.4
M6.4
M6.0
M5.8
M5.8
M5.8
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 04:59 | 05:02 | 9 | M3.9 | – | – | |
| 09:48 | 09:54 | 10 | M2.3 | – | – | |
| 10:14 | 10:15 | 4 | X1.2 | – | – | |
| 23:50 | 23:59 | 24 | M6.0 | – | – |
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.
← X1.2 2017-09-07M6.0 2017-09-07 →
About this page
A X2.1 flare that began 2017-09-07 14:15 UTC; No. 4 of 415 C-class-or-larger flares in 2017.