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X0.2 solar flare on 1977-09-09
ClassX0.2NOAA report
Peak16:461977-09-09 UTC
Duration51 min
Peak flux2.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 446 / 491 |
| Rank in year | 2 / 269 |
| Other M/X flares that day | 0 |
| M/X flares that month | 8 |
| Solar cycle | Cycle 21 |
| Position on disk | N10E80 |
| Active region | AR 889 (13 flares) |
Compared with the strongest flares of 1977
M2.0
M2.0
M2.0
M1.0
M1.0
M0.8
M0.7
M0.5
M0.5
M0.5
M0.4
M0.4
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 1977-09-07X0.2 1977-09-19 →
About this page
A X0.2 flare that began 1977-09-09 16:04 UTC; No. 2 of 269 C-class-or-larger flares in 1977.