Solar Flare WatchHome › Flare history › 1986
M6.4 solar flare on 1986-02-04
ClassM6.4NOAA report
Peak10:331986-02-04 UTC
Duration22 min
Peak flux6.4e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 4 / 166 |
| Other M/X flares that day | 1 |
| M/X flares that month | 12 |
| Solar cycle | Cycle 21 |
| Position on disk | S02E68 |
| Active region | AR 4713 (26 flares) |
Compared with the strongest flares of 1986
X3.0
X1.7
M6.6
M6.4
M6.4
M5.2
M4.7
M3.0
M2.4
M2.3
M2.2
M1.6
Other M/X flares that day
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.
← X3.0 1986-02-04X1.7 1986-02-06 →
About this page
A M6.4 flare that began 1986-02-04 10:27 UTC; No. 4 of 166 C-class-or-larger flares in 1986.