Solar Flare WatchHome › Flare history › 1989
X1.0 solar flare on 1989-10-27
ClassX1.0NOAA report
Peak19:011989-10-27 UTC
Duration12 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 404 / 491 |
| Rank in year | 56 / 2608 |
| Other M/X flares that day | 1 |
| M/X flares that month | 39 |
| Solar cycle | Cycle 22 |
| Position on disk | S32W90 |
| Active region | AR 5747 (53 flares) |
Compared with the strongest flares of 1989
X20.0
X15.0
X13.0
X9.8
X6.5
X5.7
X4.5
X4.1
X4.0
X4.0
X3.9
X3.6
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.
← M6.2 1989-10-27M9.2 1989-11-06 →
About this page
A X1.0 flare that began 1989-10-27 19:01 UTC; No. 56 of 2,608 C-class-or-larger flares in 1989.