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Solar flares in August 1991
C-class179
M-class33
X-class2
LargestX2.11991-08-25
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| August 1990 | 160 | 25 | 1 | X3.0 |
| August 1991 | 179 | 33 | 2 | X2.1 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-08-25 | 00:31 | 00:49 | 272 | X2.1 | N24E77 | 6805 |
| 1991-08-02 | 03:07 | 03:16 | 52 | X1.5 | N25E15 | 6757 |
| 1991-08-03 | 22:26 | 22:34 | 29 | M7.4 | N23W11 | 6757 |
| 1991-08-16 | 06:11 | 06:20 | 60 | M6.7 | S10E65 | 6786 |
| 1991-08-28 | 15:55 | 15:59 | 18 | M4.3 | N11W88 | 6785 |
| 1991-08-01 | 15:10 | 15:21 | 70 | M4.0 | S16W10 | 6749 |
| 1991-08-29 | 04:59 | 05:09 | 27 | M3.0 | – | 6785 |
| 1991-08-03 | 01:21 | 01:23 | 8 | M2.9 | N23W02 | 6757 |
| 1991-08-22 | 22:27 | 22:29 | 30 | M2.9 | S11W27 | 6786 |
| 1991-08-31 | 01:50 | 02:01 | 83 | M2.9 | S20E33 | 6811 |
| 1991-08-01 | 21:50 | 21:56 | 32 | M2.8 | – | – |
| 1991-08-07 | 19:01 | 19:07 | 37 | M2.6 | S16W60 | 6758 |
| 1991-08-30 | 01:14 | 01:17 | 34 | M2.6 | S21E48 | 6811 |
| 1991-08-01 | 14:47 | 14:49 | 10 | M2.4 | N25E20 | 6757 |
| 1991-08-25 | 23:20 | 23:33 | 89 | M2.4 | N25E67 | 6805 |
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
214 flares of class C or larger in August 1991; by M/X count it ranks 87 of 565 months.