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X1.8 solar flare on 2014-12-20
ClassX1.8NOAA report
Peak00:282014-12-20 UTC
Duration44 min
Peak flux1.8e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 230 / 491 |
| Rank in year | 6 / 2016 |
| Other M/X flares that day | 0 |
| M/X flares that month | 18 |
| Solar cycle | Cycle 24 |
| Position on disk | S21W24 |
| Active region | AR 12242 (44 flares) |
Compared with the strongest flares of 2014
X4.9
X3.1
X2.2
X2.0
X2.0
X1.8
X1.6
X1.6
X1.6
X1.5
X1.3
X1.2
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.
← M6.9 2014-12-18M5.6 2015-01-13 →
About this page
A X1.8 flare that began 2014-12-20 00:11 UTC; No. 6 of 2,016 C-class-or-larger flares in 2014.