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Solar flares in January 1991
C-class240
M-class32
X-class4
LargestX10.01991-01-25
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| January 1990 | 143 | 25 | 0 | M6.9 |
| January 1991 | 240 | 32 | 4 | X10.0 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-01-25 | 06:30 | 06:30 | 8 | X10.0 | S16E78 | 6471 |
| 1991-01-27 | 14:40 | 14:42 | 182 | X1.9 | S14E59 | 6471 |
| 1991-01-31 | 01:58 | 02:22 | 201 | X1.3 | S17W35 | 6469 |
| 1991-01-30 | 08:49 | 09:00 | 96 | X1.0 | S08W34 | 6466 |
| 1991-01-17 | 14:57 | 15:02 | 28 | M6.9 | S13W04 | 6455 |
| 1991-01-21 | 00:20 | 00:33 | 68 | M6.1 | S12W47 | 6455 |
| 1991-01-11 | 15:21 | 15:26 | 25 | M4.6 | S04E61 | 6447 |
| 1991-01-22 | 05:46 | 05:56 | 19 | M3.4 | S13W67 | 6455 |
| 1991-01-22 | 15:22 | 15:27 | 27 | M3.2 | S19E66 | 6462 |
| 1991-01-24 | 03:29 | 03:37 | 34 | M3.2 | S19E42 | 6462 |
| 1991-01-21 | 06:32 | 06:43 | 90 | M2.7 | – | – |
| 1991-01-22 | 19:34 | 19:55 | 98 | M2.7 | S15W72 | 6455 |
| 1991-01-22 | 13:13 | 13:16 | 43 | M2.4 | S12W67 | 6455 |
| 1991-01-25 | 13:17 | 13:29 | 69 | M2.4 | S08E30 | 6466 |
| 1991-01-18 | 00:46 | 01:58 | 111 | M2.3 | S05W24 | 6447 |
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.
← December 1990February 1991 →
About this page
276 flares of class C or larger in January 1991; by M/X count it ranks 82 of 565 months.