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Solar flares in October 2016
C-class4
M-class0
X-class0
LargestC4.22016-10-17
Sunspot number29.1NOAA SWPC
Flares per day (C and above)
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| October 2015 | 148 | 10 | 0 | M5.5 |
| October 2016 | 4 | 0 | 0 | C4.2 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2016-10-17 | 00:08 | 00:38 | 44 | C4.2 | – | – |
| 2016-10-13 | 20:40 | 21:05 | 41 | C1.3 | – | – |
| 2016-10-12 | 11:51 | 11:55 | 8 | C1.1 | S18W38 | 12599 |
| 2016-10-14 | 14:43 | 14:49 | 11 | 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.
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About this page
4 flares of class C or larger in October 2016; by M/X count it ranks 539 of 565 months.