Solar Flare WatchSolar flares in 1991
C2653
M590
X54
LargestX12.01991-06-01
M/X flares by month
- January 1991
- February 1991
- March 1991
- April 1991
- May 1991
- June 1991
- July 1991
- August 1991
- September 1991
- October 1991
- November 1991
- December 1991
Nearby years (M + X)
22
30
206
679
289
644
212
74
25
11
5
Top 20 flares
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 1991-06-01 | 15:09 | 15:29 | 65 | X12.0 | N25E90 | 6659 |
| 1991-06-04 | 03:37 | – | 233 | X12.0 | N30E70 | 6659 |
| 1991-06-06 | 00:54 | 01:12 | 81 | X12.0 | N33E44 | 6659 |
| 1991-06-11 | 02:09 | 02:29 | 71 | X12.0 | N31W17 | 6659 |
| 1991-06-15 | 06:33 | 08:31 | 284 | X12.0 | N33W69 | 6659 |
| 1991-01-25 | 06:30 | 06:30 | 8 | X10.0 | S16E78 | 6471 |
| 1991-06-09 | 01:37 | 01:40 | 167 | X10.0 | N34E04 | 6659 |
| 1991-03-22 | 22:43 | 22:45 | 34 | X9.4 | S26E28 | 6555 |
| 1991-03-04 | 13:56 | 14:03 | 112 | X7.1 | – | – |
| 1991-10-27 | 05:38 | 05:49 | 80 | X6.1 | S13E15 | 6891 |
| 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 |
| 1991-12-20 | 14:00 | 14:13 | 57 | X3.5 | S15E64 | 6982 |
| 1991-09-07 | 19:11 | 19:35 | 70 | X3.3 | S11W50 | 6818 |
| 1991-05-18 | 05:06 | 05:46 | 162 | X2.8 | N32W85 | 6619 |
| 1991-03-07 | 23:14 | 23:19 | 15 | X2.5 | S24E53 | 6538 |
| 1991-10-30 | 06:11 | 06:21 | 172 | X2.5 | S08W25 | 6891 |
| 1991-03-29 | 06:42 | 06:48 | 52 | X2.4 | S28W60 | 6555 |
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
3,297 flares of class C+ in 1991: 590 M-class and 54 X-class.