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X0.5 solar flare on 1979-08-20
ClassX0.5NOAA report
Peak09:231979-08-20 UTC
Duration99 min
Peak flux5.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 437 / 491 |
| Rank in year | 2 / 1469 |
| Other M/X flares that day | 0 |
| M/X flares that month | 19 |
| Solar cycle | Cycle 21 |
| Position on disk | N05E76 |
| Active region | AR 1943 (31 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
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.
← X0.6 1979-08-18X0.2 1979-08-26 →
About this page
A X0.5 flare that began 1979-08-20 09:06 UTC; No. 2 of 1,469 C-class-or-larger flares in 1979.