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Solar flares in April 2001
C-class145
M-class38
X-class8
LargestX20.02001-04-02
Sunspot number163.6NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| April 2000 | 181 | 11 | 0 | M4.3 |
| April 2001 | 145 | 38 | 8 | X20.0 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2001-04-02 | 21:32 | 21:51 | 31 | X20.0 | – | 9393 |
| 2001-04-15 | 13:19 | 13:50 | 36 | X14.4 | S20W85 | 9415 |
| 2001-04-06 | 19:10 | 19:21 | 21 | X5.6 | S21E31 | 9415 |
| 2001-04-10 | 05:06 | 05:26 | 36 | X2.3 | S23W09 | 9415 |
| 2001-04-12 | 09:39 | 10:28 | 70 | X2.0 | S19W43 | 9415 |
| 2001-04-02 | 10:04 | 10:14 | 16 | X1.4 | N17W60 | 9393 |
| 2001-04-03 | 03:25 | 03:57 | 90 | X1.2 | S21E83 | 9415 |
| 2001-04-02 | 10:58 | 11:36 | 67 | X1.1 | – | – |
| 2001-04-05 | 08:37 | 09:22 | 77 | M8.4 | – | 9417 |
| 2001-04-09 | 15:20 | 15:34 | 40 | M7.9 | S21W04 | 9415 |
| 2001-04-26 | 11:26 | 13:12 | 113 | M7.8 | N17W31 | 9433 |
| 2001-04-01 | 10:55 | 12:17 | 149 | M5.5 | – | – |
| 2001-04-05 | 16:57 | 17:25 | 77 | M5.1 | S24E50 | 9415 |
| 2001-04-20 | 19:51 | 20:04 | 25 | M4.1 | N15E55 | 9433 |
| 2001-04-01 | 19:44 | 19:49 | 12 | M4.0 | N17W57 | 9393 |
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
191 flares of class C or larger in April 2001; by M/X count it ranks 51 of 565 months.