Solar Flare WatchHome › Flare history › 1991
M9.3 solar flare on 1991-03-05
ClassM9.3NOAA report
Peak05:061991-03-05 UTC
Duration47 min
Peak flux9.3e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 59 / 3297 |
| Other M/X flares that day | 6 |
| M/X flares that month | 123 |
| Solar cycle | Cycle 22 |
Compared with the strongest flares of 1991
X12.0
X12.0
X12.0
X12.0
X12.0
X10.0
X10.0
X9.4
X7.1
X6.1
X5.5
X5.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 02:19 | 02:26 | 41 | M1.5 | – | – | |
| 02:56 | 03:12 | 29 | X1.5 | S23E88 | 6538 | |
| 06:15 | 06:28 | 18 | M1.4 | – | – | |
| 09:10 | 09:16 | 35 | X2.0 | S19E93 | 6538 | |
| 17:16 | 17:18 | 32 | X1.4 | S09E69 | 6537 | |
| 23:26 | 23:26 | 19 | M6.2 | S23E79 | 6538 |
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.
← X1.5 1991-03-05X2.0 1991-03-05 →
About this page
A M9.3 flare that began 1991-03-05 04:58 UTC; No. 59 of 3,297 C-class-or-larger flares in 1991.