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Solar flares in October 2004
C-class86
M-class9
X-class1
LargestX1.22004-10-30
Sunspot number77.9NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| October 2003 | 106 | 37 | 7 | X17.2 |
| October 2004 | 86 | 9 | 1 | X1.2 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2004-10-30 | 11:38 | 11:46 | 12 | X1.2 | N13W25 | 10691 |
| 2004-10-30 | 16:18 | 16:33 | 19 | M5.9 | N13W28 | 10691 |
| 2004-10-30 | 06:08 | 06:18 | 14 | M4.2 | N13W22 | 10691 |
| 2004-10-30 | 09:09 | 09:28 | 21 | M3.7 | N14W24 | 10691 |
| 2004-10-30 | 03:23 | 03:33 | 14 | M3.3 | N13W20 | 10691 |
| 2004-10-20 | 10:43 | 10:51 | 13 | M2.6 | N11E68 | 10687 |
| 2004-10-24 | 20:17 | 20:28 | 18 | M2.3 | N10E15 | 10687 |
| 2004-10-31 | 05:23 | 05:32 | 16 | M2.3 | N12W36 | 10691 |
| 2004-10-22 | 07:52 | 08:11 | 24 | M2.1 | N11E44 | 10687 |
| 2004-10-31 | 02:04 | 02:26 | 28 | M1.1 | N12W35 | 10691 |
| 2004-10-21 | 19:24 | 19:48 | 32 | C9.9 | N10E50 | 10687 |
| 2004-10-23 | 16:22 | 16:54 | 46 | C9.9 | N11E30 | 10687 |
| 2004-10-30 | 00:39 | 00:49 | 14 | C9.7 | N14W19 | 10691 |
| 2004-10-23 | 19:16 | 19:22 | 8 | C8.0 | N14E33 | 10687 |
| 2004-10-21 | 00:18 | 00:40 | 34 | C7.8 | N11E60 | 10687 |
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.
← September 2004November 2004 →
About this page
96 flares of class C or larger in October 2004; by M/X count it ranks 241 of 565 months.