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M6.9 solar flare on 1990-01-21
ClassM6.9NOAA report
Peak04:441990-01-21 UTC
Duration69 min
Peak flux6.9e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 25 / 2551 |
| Other M/X flares that day | 1 |
| M/X flares that month | 25 |
| Solar cycle | Cycle 22 |
| Position on disk | S11E22 |
| Active region | AR 5890 (13 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 |
|---|---|---|---|---|---|---|
| 16:04 | 16:23 | 135 | M1.6 | S28E39 | 5892 |
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.
← M5.6 1990-01-20M6.9 1990-02-03 →
About this page
A M6.9 flare that began 1990-01-21 04:29 UTC; No. 25 of 2,551 C-class-or-larger flares in 1990.