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X9.8 solar flare on 1989-09-29
ClassX9.8NOAA report
Peak11:331989-09-29 UTC
Duration228 min
Peak flux9.8e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 23 / 491 |
| Rank in year | 4 / 2608 |
| Other M/X flares that day | 0 |
| M/X flares that month | 71 |
| Solar cycle | Cycle 22 |
| Active region | AR 5698 (31 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
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.
← M7.3 1989-09-12M7.4 1989-10-18 →
About this page
A X9.8 flare that began 1989-09-29 10:47 UTC; No. 4 of 2,608 C-class-or-larger flares in 1989.