Solar Flare WatchHome › Flare history › 1979
X0.1 solar flare on 1979-02-21
ClassX0.1NOAA report
Peak14:211979-02-21 UTC
Duration38 min
Peak flux1.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 476 / 491 |
| Rank in year | 12 / 1469 |
| Other M/X flares that day | 2 |
| M/X flares that month | 45 |
| Solar cycle | Cycle 21 |
| Position on disk | N17W28 |
| Active region | AR 1574 (37 flares) |
Compared with the strongest flares of 1979
M6.0
M5.0
M5.0
M3.0
M2.0
M2.0
M2.0
M2.0
M2.0
M1.0
M1.0
M1.0
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.
← X0.2 1979-02-18X0.1 1979-03-01 →
About this page
A X0.1 flare that began 1979-02-21 14:18 UTC; No. 12 of 1,469 C-class-or-larger flares in 1979.