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Solar flares in May 2015
C-class109
M-class5
X-class1
LargestX2.72015-05-05
Sunspot number83.0NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| May 2014 | 125 | 5 | 0 | M5.3 |
| May 2015 | 109 | 5 | 1 | X2.7 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2015-05-05 | 22:05 | 22:11 | 10 | X2.7 | – | – |
| 2015-05-05 | 17:12 | 17:24 | 18 | M2.6 | S17E15 | 12335 |
| 2015-05-05 | 09:42 | 09:47 | 9 | M1.9 | – | – |
| 2015-05-06 | 11:45 | 11:49 | 6 | M1.9 | N17E67 | 12339 |
| 2015-05-05 | 14:19 | 14:25 | 13 | M1.3 | S17E39 | 12335 |
| 2015-05-05 | 13:45 | 13:53 | 11 | M1.2 | N15E75 | 12339 |
| 2015-05-13 | 18:09 | 18:18 | 29 | C9.2 | N09E02 | 12343 |
| 2015-05-04 | 00:43 | 00:52 | 23 | C8.0 | S17E39 | 12335 |
| 2015-05-09 | 01:12 | 01:34 | 69 | C7.4 | N14E77 | – |
| 2015-05-05 | 11:20 | 11:29 | 23 | C6.6 | S17E19 | 12335 |
| 2015-05-08 | 03:56 | 04:09 | 18 | C5.5 | N10E46 | 12339 |
| 2015-05-04 | 16:57 | 17:05 | 15 | C5.2 | – | – |
| 2015-05-05 | 03:51 | 04:03 | 17 | C5.1 | N09E77 | – |
| 2015-05-07 | 19:47 | 20:00 | 22 | C5.0 | – | – |
| 2015-05-14 | 17:45 | 17:53 | 14 | C4.8 | – | – |
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
115 flares of class C or larger in May 2015; by M/X count it ranks 303 of 565 months.