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M9.7 solar flare on 1989-12-28
ClassM9.7NOAA report
Peak03:491989-12-28 UTC
Duration112 min
Peak flux9.7e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 63 / 2608 |
| Other M/X flares that day | 3 |
| M/X flares that month | 39 |
| Solar cycle | Cycle 22 |
| Position on disk | S25W07 |
| Active region | AR 5852 (17 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 |
|---|---|---|---|---|---|---|
| 07:49 | 07:55 | 29 | M1.3 | – | – | |
| 09:57 | 10:07 | 26 | M1.6 | S08E15 | 5853 | |
| 21:08 | 21:15 | 29 | M4.1 | S18E30 | 5858 |
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.
← M6.9 1989-12-26M8.1 1989-12-29 →
About this page
A M9.7 flare that began 1989-12-28 03:38 UTC; No. 63 of 2,608 C-class-or-larger flares in 1989.