Solar Flare WatchHome › Flare history › 1978
X0.2 solar flare on 1978-04-30
ClassX0.2NOAA report
Peak15:081978-04-30 UTC
Duration191 min
Peak flux2.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 449 / 491 |
| Rank in year | 7 / 1141 |
| Other M/X flares that day | 0 |
| M/X flares that month | 20 |
| Solar cycle | Cycle 21 |
| Position on disk | N24E11 |
| Active region | AR 1092 (50 flares) |
Compared with the strongest flares of 1978
X1.5
M5.0
M3.0
M3.0
M3.0
M2.0
M2.0
M2.0
M2.0
M2.0
M2.0
M1.0
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.
← X0.3 1978-04-29X0.2 1978-05-07 →
About this page
A X0.2 flare that began 1978-04-30 14:37 UTC; No. 7 of 1,141 C-class-or-larger flares in 1978.