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Solar flares in September 2003
C-class73
M-class1
X-class0
LargestM1.32003-09-16
Sunspot number82.6NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2002 | 201 | 13 | 0 | M2.9 |
| September 2003 | 73 | 1 | 0 | M1.3 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2003-09-16 | 21:30 | 22:24 | 121 | M1.3 | – | – |
| 2003-09-28 | 15:25 | 15:58 | 80 | C6.8 | N03W34 | 10464 |
| 2003-09-24 | 07:12 | 07:17 | 7 | C5.4 | N01E20 | 10464 |
| 2003-09-29 | 21:41 | 21:46 | 15 | C5.4 | N03W39 | 10464 |
| 2003-09-07 | 13:38 | 14:07 | 100 | C5.3 | S16W69 | 10450 |
| 2003-09-29 | 16:05 | 16:10 | 11 | C5.1 | – | 10464 |
| 2003-09-30 | 03:14 | 03:40 | 47 | C5.1 | – | 10464 |
| 2003-09-30 | 20:09 | 20:21 | 32 | C4.9 | S02E75 | 10471 |
| 2003-09-14 | 01:15 | 01:27 | 18 | C4.4 | S07W61 | 10456 |
| 2003-09-29 | 05:00 | 05:11 | 23 | C3.9 | – | – |
| 2003-09-30 | 23:17 | 23:26 | 23 | C3.9 | N05W61 | 10464 |
| 2003-09-29 | 19:41 | 20:04 | 37 | C3.8 | N04W45 | 10464 |
| 2003-09-14 | 22:35 | 22:47 | 17 | C3.6 | S08W73 | 10456 |
| 2003-09-20 | 15:24 | 15:36 | 33 | C3.6 | – | – |
| 2003-09-29 | 13:20 | 13:39 | 42 | C3.3 | – | – |
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.
About this page
74 flares of class C or larger in September 2003; by M/X count it ranks 426 of 565 months.