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Solar flares in July 1991
C-class231
M-class29
X-class6
LargestX2.31991-07-31
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| July 1990 | 142 | 13 | 0 | M7.6 |
| July 1991 | 231 | 29 | 6 | X2.3 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-07-31 | 00:46 | 00:53 | 89 | X2.3 | S17E11 | 6749 |
| 1991-07-07 | 01:20 | 01:31 | 46 | X1.9 | N26E03 | 6703 |
| 1991-07-17 | 06:18 | 06:32 | 35 | X1.1 | S25E46 | 6729 |
| 1991-07-18 | 14:16 | 14:28 | 87 | X1.0 | N06E88 | 6734 |
| 1991-07-20 | 01:36 | 01:42 | 93 | X1.0 | N05E80 | 6734 |
| 1991-07-22 | 09:46 | 10:03 | 27 | X1.0 | N08E47 | 6734 |
| 1991-07-11 | 08:35 | 10:18 | 257 | M7.3 | N22W51 | 6703 |
| 1991-07-30 | 07:06 | 07:12 | 27 | M7.2 | N14W58 | 6734 |
| 1991-07-01 | 01:26 | 02:34 | 121 | M5.8 | N33E79 | 6703 |
| 1991-07-05 | 08:35 | 08:45 | 60 | M5.4 | N22E26 | 6703 |
| 1991-07-02 | 19:35 | 19:37 | 25 | M4.6 | N27E56 | 6703 |
| 1991-07-13 | 18:31 | 18:51 | 93 | M4.6 | – | 6729 |
| 1991-07-10 | 11:59 | 12:26 | 143 | M3.6 | S22E34 | 6718 |
| 1991-07-06 | 17:37 | 17:43 | 99 | M3.0 | N20W01 | 6711 |
| 1991-07-17 | 21:04 | 21:24 | 117 | M3.0 | S26E18 | 6728 |
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
266 flares of class C or larger in July 1991; by M/X count it ranks 86 of 565 months.