Solar Flare WatchHome › Flare history › 2001
Solar flares in May 2001
C-class132
M-class11
X-class0
LargestM6.42001-05-20
Sunspot number135.1NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 2000 | 195 | 20 | 0 | M6.8 |
| May 2001 | 132 | 11 | 0 | M6.4 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2001-05-20 | 06:00 | 06:03 | 6 | M6.4 | – | – |
| 2001-05-13 | 02:58 | 03:04 | 10 | M3.6 | S18W01 | 9455 |
| 2001-05-12 | 22:42 | 23:35 | 63 | M3.0 | S17E00 | 9455 |
| 2001-05-01 | 18:58 | 19:17 | 47 | M2.4 | N22W77 | 9433 |
| 2001-05-02 | 00:32 | 00:40 | 15 | M1.8 | – | 9441 |
| 2001-05-20 | 09:12 | 09:20 | 11 | M1.5 | – | – |
| 2001-05-16 | 10:35 | 10:42 | 10 | M1.3 | S17W47 | 9455 |
| 2001-05-17 | 16:46 | 16:52 | 11 | M1.2 | S16W64 | 9455 |
| 2001-05-24 | 19:30 | 19:44 | 34 | M1.2 | N07E29 | 9468 |
| 2001-05-05 | 08:42 | 08:56 | 33 | M1.0 | N25W06 | 9445 |
| 2001-05-15 | 02:53 | 03:00 | 15 | M1.0 | S17W29 | 9455 |
| 2001-05-08 | 00:36 | 00:55 | 41 | C9.9 | N23W43 | 9445 |
| 2001-05-17 | 20:41 | 20:49 | 18 | C9.1 | N13W19 | 9454 |
| 2001-05-21 | 03:11 | 03:20 | 14 | C9.0 | – | 9461 |
| 2001-05-02 | 06:26 | 06:33 | 17 | C8.7 | N06W22 | 9441 |
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
143 flares of class C or larger in May 2001; by M/X count it ranks 227 of 565 months.