Solar Flare WatchHome › Flare history › 1991
X1.7 solar flare on 1991-10-26
ClassX1.7NOAA report
Peak20:511991-10-26 UTC
Duration272 min
Peak flux1.7e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 237 / 491 |
| Rank in year | 33 / 3297 |
| Other M/X flares that day | 2 |
| M/X flares that month | 58 |
| Solar cycle | Cycle 22 |
| Position on disk | S09E20 |
| Active region | AR 6891 (81 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
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.
← M9.8 1991-10-24X1.9 1991-10-27 →
About this page
A X1.7 flare that began 1991-10-26 18:53 UTC; No. 33 of 3,297 C-class-or-larger flares in 1991.