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X4.0 solar flare on 1989-11-21
ClassX4.0NOAA report
Peak13:461989-11-21 UTC
Duration59 min
Peak flux4.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 70 / 491 |
| Rank in year | 10 / 2608 |
| Other M/X flares that day | 1 |
| M/X flares that month | 67 |
| Solar cycle | Cycle 22 |
| Position on disk | S26W53 |
| Active region | AR 5793 (23 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
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 09:08 | 09:12 | 28 | M1.5 | S27W51 | 5793 |
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.
← X1.0 1989-11-20X1.0 1989-11-25 →
About this page
A X4.0 flare that began 1989-11-21 13:32 UTC; No. 10 of 2,608 C-class-or-larger flares in 1989.