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Solar flares in March 1991
C-class244
M-class103
X-class20
LargestX9.41991-03-22
Flares per day (C and above)
M/X flares per day
Same month a year earlier
| Month | C | M | X | Largest |
|---|---|---|---|---|
| March 1990 | 231 | 28 | 1 | X1.5 |
| March 1991 | 244 | 103 | 20 | X9.4 |
Top 15 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-03-22 | 22:43 | 22:45 | 34 | X9.4 | S26E28 | 6555 |
| 1991-03-04 | 13:56 | 14:03 | 112 | X7.1 | – | – |
| 1991-03-07 | 06:11 | 07:48 | 206 | X5.5 | S20E66 | 6538 |
| 1991-03-25 | 07:58 | 08:18 | 46 | X5.3 | S24W13 | 6555 |
| 1991-03-26 | 20:26 | 20:34 | 71 | X4.7 | S28W23 | 6555 |
| 1991-03-13 | 15:28 | 15:59 | 48 | X3.9 | S12E41 | 6545 |
| 1991-03-07 | 23:14 | 23:19 | 15 | X2.5 | S24E53 | 6538 |
| 1991-03-29 | 06:42 | 06:48 | 52 | X2.4 | S28W60 | 6555 |
| 1991-03-05 | 09:10 | 09:16 | 35 | X2.0 | S19E93 | 6538 |
| 1991-03-14 | 18:12 | 18:14 | 19 | X1.8 | S10E25 | 6545 |
| 1991-03-16 | 00:47 | 00:50 | 22 | X1.8 | S09E09 | 6545 |
| 1991-03-08 | 20:20 | 20:29 | 13 | X1.7 | S24E43 | 6538 |
| 1991-03-12 | 12:28 | 12:50 | 48 | X1.7 | S07E59 | 6545 |
| 1991-03-05 | 02:56 | 03:12 | 29 | X1.5 | S23E88 | 6538 |
| 1991-03-05 | 17:16 | 17:18 | 32 | X1.4 | S09E69 | 6537 |
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
367 flares of class C or larger in March 1991; by M/X count it ranks 3 of 565 months.