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X0.1 solar flare on 1979-12-20
ClassX0.1NOAA report
Peak06:161979-12-20 UTC
Duration111 min
Peak flux1.0e-05W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 489 / 491 |
| Rank in year | 25 / 1469 |
| Other M/X flares that day | 3 |
| M/X flares that month | 23 |
| Solar cycle | Cycle 21 |
| Position on disk | S14E34 |
| Active region | AR 2204 (15 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
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 09:30 | 09:32 | 43 | M0.2 | S18E25 | 2204 | |
| 10:15 | 10:17 | 3 | M0.2 | S19E85 | 2207 | |
| 15:51 | 16:07 | 86 | M0.1 | S14E26 | 2204 |
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.
← X0.1 1979-12-19X0.1 1980-01-08 →
About this page
A X0.1 flare that began 1979-12-20 05:59 UTC; No. 25 of 1,469 C-class-or-larger flares in 1979.