Solar Flare WatchFlares in solar cycle 24
C7,869
M733
X51
LargestX14.62017-09-06
X flares by year
Cycles compared
| Cycle | Start | M | X | Largest |
|---|---|---|---|---|
| 21 | 1976-03 | 2184 | 168 | X13.0 |
| 22 | 1986-09 | 2022 | 153 | X20.0 |
| 23 | 1996-08 | 1436 | 125 | X28.0 |
| 24 | 2008-12 | 733 | 51 | X14.6 |
| 25 | 2019-12 | 1980 | 102 | X8.9 |
Top 20 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2017-09-06 | 11:52 | 12:02 | 18 | X14.6 | – | – |
| 2017-09-10 | 15:34 | 16:06 | 57 | X12.9 | – | – |
| 2011-08-09 | 07:48 | 08:05 | 20 | X6.9 | – | 11263 |
| 2012-03-07 | 00:02 | 00:24 | 38 | X5.4 | N17E27 | 11429 |
| 2014-02-25 | 00:39 | 00:49 | 24 | X4.9 | S12E82 | 11990 |
| 2013-11-05 | 22:07 | 22:12 | 8 | X3.3 | S13E44 | 11890 |
| 2013-05-14 | 00:00 | 01:11 | 80 | X3.2 | – | – |
| 2017-09-06 | 08:52 | 09:10 | 25 | X3.2 | – | – |
| 2014-10-24 | 21:07 | 21:41 | 66 | X3.1 | – | – |
| 2013-05-13 | 15:48 | 16:05 | 28 | X2.8 | N14E83 | – |
| 2015-05-05 | 22:05 | 22:11 | 10 | X2.7 | – | – |
| 2013-10-29 | 21:42 | 21:54 | 19 | X2.3 | – | – |
| 2011-02-15 | 01:44 | 01:56 | 22 | X2.2 | – | 11158 |
| 2014-06-10 | 11:36 | 11:42 | 8 | X2.2 | S15E80 | – |
| 2015-03-11 | 16:11 | 16:22 | 18 | X2.2 | S17E21 | 12297 |
| 2011-09-06 | 22:12 | 22:20 | 12 | X2.1 | – | 11283 |
| 2013-10-25 | 14:51 | 15:03 | 21 | X2.1 | – | – |
| 2017-09-07 | 14:15 | 14:36 | 40 | X2.1 | – | – |
| 2014-10-26 | 10:04 | 10:56 | 74 | X2.0 | S18W40 | 12192 |
| 2014-10-27 | 14:12 | 14:47 | 57 | X2.0 | S17W52 | 12192 |
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
Cycle 24, which began in December 2008, has 8,653 C+ flares on record, 51 of them X-class.