Solar Flare WatchHome › Flare history › 1991
M5.3 solar flare on 1991-05-28
ClassM5.3NOAA report
Peak10:231991-05-28 UTC
Duration13 min
Peak flux5.3e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 105 / 3297 |
| Other M/X flares that day | 8 |
| M/X flares that month | 41 |
| Solar cycle | Cycle 22 |
| Position on disk | N08E57 |
| Active region | AR 6654 (32 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 |
|---|---|---|---|---|---|---|
| 01:16 | 01:23 | 13 | M1.1 | – | – | |
| 03:29 | 03:34 | 22 | M1.5 | N05E62 | 6654 | |
| 05:14 | 05:37 | 35 | M2.2 | N09E64 | 6654 | |
| 07:00 | 07:01 | 77 | M3.2 | N06E61 | 6654 | |
| 13:05 | 13:13 | 25 | M2.4 | N08E55 | 6654 | |
| 14:42 | 15:18 | 84 | M1.7 | N07E59 | 6654 | |
| 16:14 | 16:22 | 25 | M1.5 | N06E55 | 6654 | |
| 22:06 | 22:13 | 16 | M1.4 | N05E51 | 6654 |
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.
← X2.8 1991-05-18X1.0 1991-05-29 →
About this page
A M5.3 flare that began 1991-05-28 10:18 UTC; No. 105 of 3,297 C-class-or-larger flares in 1991.