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X4.0 solar flare on 1989-03-09
ClassX4.0NOAA report
Peak15:321989-03-09 UTC
Duration79 min
Peak flux4.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 69 / 491 |
| Rank in year | 9 / 2608 |
| Other M/X flares that day | 6 |
| M/X flares that month | 100 |
| Solar cycle | Cycle 22 |
| Position on disk | N30E38 |
| Active region | AR 5395 (107 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 |
|---|---|---|---|---|---|---|
| 02:39 | 02:43 | 20 | M1.8 | N30E49 | 5395 | |
| 10:03 | 10:11 | 21 | M7.6 | – | – | |
| 12:56 | 13:07 | 125 | M2.4 | N27E40 | 5395 | |
| 19:13 | 19:25 | 45 | M1.2 | N34E36 | 5395 | |
| 23:04 | 23:24 | 97 | M1.3 | N31E32 | 5395 | |
| 23:34 | 23:54 | 49 | M1.6 | – | – |
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.
← M7.6 1989-03-09X4.5 1989-03-10 →
About this page
A X4.0 flare that began 1989-03-09 15:15 UTC; No. 9 of 2,608 C-class-or-larger flares in 1989.