Solar Flare WatchHome › Flare history › 1991
M5.2 solar flare on 1991-06-17
ClassM5.2NOAA report
Peak04:121991-06-17 UTC
Duration8 min
Peak flux5.2e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 109 / 3297 |
| Other M/X flares that day | 3 |
| M/X flares that month | 72 |
| Solar cycle | Cycle 22 |
| Position on disk | N33W90 |
| Active region | AR 6659 (72 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 |
|---|---|---|---|---|---|---|
| 01:32 | 01:48 | 33 | M1.4 | S13W63 | 6675 | |
| 08:09 | 08:09 | 8 | M2.2 | S14E04 | 6680 | |
| 08:27 | 08:28 | 12 | M4.0 | N35W89 | 6659 |
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.
← M5.5 1991-06-15M6.0 1991-06-28 →
About this page
A M5.2 flare that began 1991-06-17 04:12 UTC; No. 109 of 3,297 C-class-or-larger flares in 1991.