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Solar flares in September 2012
C-class102
M-class4
X-class0
LargestM1.62012-09-06
Sunspot number84.0NOAA SWPC
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| September 2011 | 152 | 31 | 4 | X2.1 |
| September 2012 | 102 | 4 | 0 | M1.6 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 2012-09-06 | 04:06 | 04:13 | 14 | M1.6 | – | – |
| 2012-09-08 | 17:35 | 17:59 | 45 | M1.4 | – | – |
| 2012-09-30 | 04:27 | 04:33 | 15 | M1.3 | – | – |
| 2012-09-09 | 21:50 | 22:36 | 66 | M1.2 | S15W52 | 11564 |
| 2012-09-30 | 23:17 | 23:39 | 27 | C9.9 | N09W89 | 11575 |
| 2012-09-06 | 15:13 | 15:21 | 17 | C8.0 | – | – |
| 2012-09-05 | 07:02 | 08:06 | 91 | C7.2 | S12E14 | 11564 |
| 2012-09-30 | 21:16 | 21:20 | 7 | C7.1 | – | – |
| 2012-09-05 | 03:38 | 03:47 | 24 | C6.1 | S14E15 | 11564 |
| 2012-09-10 | 23:42 | 23:56 | 26 | C6.0 | – | – |
| 2012-09-02 | 18:00 | 18:10 | 15 | C5.5 | N07W16 | 11560 |
| 2012-09-25 | 17:47 | 17:53 | 9 | C4.5 | N20E71 | 11580 |
| 2012-09-27 | 17:04 | 17:20 | 26 | C4.4 | S18E39 | – |
| 2012-09-03 | 02:40 | 02:47 | 12 | C4.0 | S14E39 | 11564 |
| 2012-09-07 | 00:36 | 00:45 | 17 | C3.7 | – | – |
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
106 flares of class C or larger in September 2012; by M/X count it ranks 333 of 565 months.