Solar Flare WatchHome › Flare history › 1990
X1.8 solar flare on 1990-12-24
ClassX1.8NOAA report
Peak15:461990-12-24 UTC
Duration33 min
Peak flux1.8e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 218 / 491 |
| Rank in year | 9 / 2551 |
| Other M/X flares that day | 3 |
| M/X flares that month | 53 |
| Solar cycle | Cycle 22 |
| Position on disk | N10W80 |
| Active region | AR 6412 (50 flares) |
Compared with the strongest flares of 1990
X9.3
X5.5
X3.6
X3.4
X3.0
X2.4
X2.2
X1.9
X1.8
X1.7
X1.5
X1.4
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 00:56 | 01:01 | 35 | M1.0 | S25E44 | 6420 | |
| 13:22 | 13:27 | 8 | M2.2 | S24E47 | 6420 | |
| 22:32 | 22:56 | 57 | M1.0 | S27E39 | 6420 |
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.
← X1.0 1990-12-23X1.9 1990-12-26 →
About this page
A X1.8 flare that began 1990-12-24 15:33 UTC; No. 9 of 2,551 C-class-or-larger flares in 1990.