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Solar flares in September 2004
C-class35
M-class4
X-class0
LargestM4.82004-09-12
Sunspot number50.0NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2003 | 73 | 1 | 0 | M1.3 |
| September 2004 | 35 | 4 | 0 | M4.8 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2004-09-12 | 00:04 | 00:56 | 89 | M4.8 | N03E49 | 10672 |
| 2004-09-12 | 01:36 | 01:39 | 5 | M3.2 | – | 10667 |
| 2004-09-19 | 16:46 | 17:12 | 53 | M1.9 | N03W58 | 10672 |
| 2004-09-14 | 07:47 | 09:30 | 133 | M1.5 | N03E16 | 10672 |
| 2004-09-21 | 08:30 | 08:36 | 9 | C7.5 | N04W77 | 10672 |
| 2004-09-10 | 16:02 | 16:13 | 24 | C6.9 | N04E69 | 10672 |
| 2004-09-19 | 10:16 | 11:48 | 117 | C3.8 | N10W53 | 10672 |
| 2004-09-09 | 04:50 | 06:01 | 110 | C3.2 | – | 10672 |
| 2004-09-22 | 08:54 | 09:20 | 42 | C3.2 | S14W09 | 10673 |
| 2004-09-07 | 13:40 | 15:29 | 183 | C2.8 | – | – |
| 2004-09-15 | 07:42 | 07:49 | 20 | C2.7 | N08E06 | 10672 |
| 2004-09-14 | 13:54 | 14:04 | 24 | C2.3 | S09E86 | – |
| 2004-09-14 | 05:49 | 05:52 | 5 | C2.2 | N02E20 | 10672 |
| 2004-09-10 | 12:49 | 12:56 | 13 | C2.1 | N03E67 | 10672 |
| 2004-09-20 | 07:09 | 07:21 | 16 | C2.1 | N04W60 | 10672 |
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.
About this page
39 flares of class C or larger in September 2004; by M/X count it ranks 329 of 565 months.