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Solar flares in June 2021
C-class13
M-class0
X-class0
LargestC3.72021-06-09
Sunspot number24.4NOAA SWPC
Flares per day (C and above)
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2021-06-09 | 08:44 | 09:07 | 37 | C3.7 | – | – |
| 2021-06-30 | 18:09 | 18:15 | 9 | C3.7 | – | – |
| 2021-06-23 | 06:43 | 07:07 | 50 | C3.4 | – | – |
| 2021-06-08 | 17:16 | 17:23 | 13 | C2.4 | – | – |
| 2021-06-28 | 09:15 | 09:35 | 31 | C2.0 | – | – |
| 2021-06-09 | 11:50 | 11:59 | 11 | C1.7 | – | – |
| 2021-06-25 | 13:45 | 14:03 | 29 | C1.7 | – | – |
| 2021-06-01 | 04:27 | 04:31 | 6 | C1.6 | – | – |
| 2021-06-28 | 18:56 | 19:11 | 19 | C1.6 | – | – |
| 2021-06-08 | 10:46 | 10:53 | 12 | C1.4 | – | – |
| 2021-06-30 | 17:23 | 17:28 | 7 | C1.4 | – | – |
| 2021-06-08 | 18:47 | 19:08 | 29 | C1.1 | – | – |
| 2021-06-10 | 05:59 | 06:42 | 57 | C1.0 | – | – |
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
13 flares of class C or larger in June 2021; by M/X count it ranks 565 of 565 months.