Solar Flare WatchHome › Flare history › 2004
M9.4 solar flare on 2004-08-15
ClassM9.4NOAA report
Peak12:412004-08-15 UTC
Duration9 min
Peak flux9.4e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 13 / 1046 |
| Other M/X flares that day | 4 |
| M/X flares that month | 28 |
| Solar cycle | Cycle 23 |
| Position on disk | S13W46 |
| Active region | AR 10656 (125 flares) |
Compared with the strongest flares of 2004
X3.6
X2.5
X2.0
X1.8
X1.8
X1.6
X1.3
X1.2
X1.1
X1.1
X1.0
X1.0
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 04:45 | 05:06 | 37 | M1.2 | S13W44 | 10656 | |
| 05:54 | 06:00 | 10 | M1.2 | S13W44 | 10656 | |
| 11:23 | 11:32 | 25 | M2.6 | S13W46 | 10656 | |
| 18:37 | 18:45 | 13 | M1.2 | S13W50 | 10656 |
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.
← M5.6 2004-08-14X1.8 2004-08-18 →
About this page
A M9.4 flare that began 2004-08-15 12:34 UTC; No. 13 of 1,046 C-class-or-larger flares in 2004.