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M8.4 solar flare on 2017-09-04
ClassM8.4GOES-16 science data
Peak20:332017-09-04 UTC
Duration16 min
Peak flux8.4e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 7 / 415 |
| Other M/X flares that day | 7 |
| 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 |
|---|---|---|---|---|---|---|
| 12:12 | 12:16 | – | M1.2 | – | – | |
| 12:20 | 12:25 | 8 | M1.2 | – | – | |
| 15:24 | 15:30 | 9 | M2.3 | – | – | |
| 18:12 | 18:22 | 17 | M1.5 | – | – | |
| 19:25 | 19:37 | 20 | M2.6 | – | – | |
| 19:58 | 20:02 | 8 | M2.3 | – | – | |
| 22:09 | 22:14 | 10 | M3.3 | – | – |
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.
← M5.8 2017-04-03M6.4 2017-09-05 →
About this page
A M8.4 flare that began 2017-09-04 20:22 UTC; No. 7 of 415 C-class-or-larger flares in 2017.