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M6.6 solar flare on 1990-12-04
ClassM6.6NOAA report
Peak02:021990-12-04 UTC
Duration48 min
Peak flux6.6e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 27 / 2551 |
| Other M/X flares that day | 1 |
| M/X flares that month | 53 |
| Solar cycle | Cycle 22 |
| Position on disk | N08E56 |
| Active region | AR 6397 (23 flares) |
Compared with the strongest flares of 1990
X9.3
X5.5
X3.6
X3.4
X3.0
X2.4
X2.2
X1.9
X1.8
X1.7
X1.5
X1.4
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 14:20 | 14:35 | 87 | M1.8 | N08E51 | 6397 |
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.
← M7.5 1990-11-26M5.8 1990-12-10 →
About this page
A M6.6 flare that began 1990-12-04 01:58 UTC; No. 27 of 2,551 C-class-or-larger flares in 1990.