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Solar flares in April 2015
C-class109
M-class11
X-class0
LargestM4.02015-04-21
Sunspot number72.6NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| April 2014 | 169 | 3 | 1 | X1.3 |
| April 2015 | 109 | 11 | 0 | M4.0 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2015-04-21 | 15:24 | 15:45 | 27 | M4.0 | N09W85 | 12322 |
| 2015-04-21 | 10:17 | 10:40 | 42 | M2.2 | – | – |
| 2015-04-21 | 11:49 | 11:57 | 13 | M2.2 | N10W84 | 12322 |
| 2015-04-21 | 16:55 | 17:00 | 14 | M2.1 | N13W84 | 12322 |
| 2015-04-21 | 21:39 | 21:45 | 16 | M1.8 | N03W18 | 12325 |
| 2015-04-08 | 14:37 | 14:43 | 10 | M1.4 | S14W04 | 12320 |
| 2015-04-21 | 21:58 | 22:01 | 6 | M1.2 | – | – |
| 2015-04-12 | 08:51 | 09:50 | 113 | M1.1 | N10E66 | – |
| 2015-04-22 | 08:30 | 08:44 | 28 | M1.1 | S09E05 | 12332 |
| 2015-04-23 | 09:18 | 10:07 | 112 | M1.1 | – | – |
| 2015-04-21 | 07:08 | 07:21 | 19 | M1.0 | N09W80 | 12322 |
| 2015-04-19 | 05:51 | 06:04 | 24 | C9.3 | – | – |
| 2015-04-12 | 17:58 | 18:07 | 12 | C9.0 | – | – |
| 2015-04-10 | 07:57 | 08:03 | 9 | C7.9 | S15W28 | 12320 |
| 2015-04-15 | 20:13 | 20:23 | 32 | C7.9 | N10E15 | 12321 |
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
120 flares of class C or larger in April 2015; by M/X count it ranks 230 of 565 months.