Solar Flare WatchHome › Flare history › 2001
Solar flares in September 2001
C-class211
M-class50
X-class1
LargestX2.62001-09-24
Sunspot number229.1NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2000 | 211 | 14 | 1 | X1.2 |
| September 2001 | 211 | 50 | 1 | X2.6 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2001-09-24 | 09:32 | 10:38 | 97 | X2.6 | S16E23 | 9632 |
| 2001-09-09 | 20:40 | 20:45 | 8 | M9.5 | S31E26 | 9608 |
| 2001-09-17 | 15:44 | 15:50 | 10 | M8.1 | S32W73 | 9608 |
| 2001-09-25 | 04:24 | 04:40 | 28 | M7.6 | S18W01 | 9628 |
| 2001-09-05 | 14:25 | 14:32 | 9 | M6.0 | N15W31 | 9601 |
| 2001-09-16 | 03:39 | 03:53 | 39 | M5.6 | S29W54 | 9608 |
| 2001-09-11 | 20:25 | 20:36 | 18 | M4.5 | S12E88 | 9616 |
| 2001-09-04 | 21:53 | 21:59 | 12 | M3.7 | N15W23 | 9601 |
| 2001-09-14 | 21:41 | 21:50 | 19 | M3.7 | – | 9616 |
| 2001-09-09 | 15:10 | 15:16 | 11 | M3.4 | S17E03 | 9607 |
| 2001-09-28 | 08:10 | 08:30 | 60 | M3.3 | N10E18 | 9636 |
| 2001-09-02 | 13:41 | 13:48 | 13 | M3.0 | S21W65 | 9591 |
| 2001-09-11 | 00:49 | 01:11 | 34 | M2.6 | – | – |
| 2001-09-03 | 18:21 | 18:41 | 49 | M2.5 | – | – |
| 2001-09-28 | 09:34 | 10:14 | 76 | M2.4 | S18W36 | 9628 |
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
262 flares of class C or larger in September 2001; by M/X count it ranks 36 of 565 months.