Solar Flare WatchHome › Flare history › 1991
M7.0 solar flare on 1991-03-20
ClassM7.0NOAA report
Peak06:161991-03-20 UTC
Duration60 min
Peak flux7.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 75 / 3297 |
| Other M/X flares that day | 5 |
| M/X flares that month | 123 |
| Solar cycle | Cycle 22 |
| Position on disk | S25E52 |
| Active region | AR 6555 (79 flares) |
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 |
|---|---|---|---|---|---|---|
| 03:26 | 03:33 | 20 | M1.9 | – | – | |
| 03:46 | 03:50 | 76 | M2.5 | S09W41 | 6545 | |
| 10:35 | 10:43 | 14 | M1.7 | – | – | |
| 10:52 | 11:02 | 16 | M1.1 | – | – | |
| 18:12 | 18:21 | 24 | M1.1 | S21E53 | 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.
← M6.7 1991-03-19X1.0 1991-03-21 →
About this page
A M7.0 flare that began 1991-03-20 05:35 UTC; No. 75 of 3,297 C-class-or-larger flares in 1991.