Solar Flare WatchHome › Flare history › 1982
X1.2 solar flare on 1982-12-18
ClassX1.2NOAA report
Peak08:251982-12-18 UTC
Duration34 min
Peak flux1.2e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 325 / 491 |
| Rank in year | 34 / 3850 |
| Other M/X flares that day | 2 |
| M/X flares that month | 88 |
| Solar cycle | Cycle 21 |
| Position on disk | S10W20 |
| Active region | AR 4026 (38 flares) |
Compared with the strongest flares of 1982
X12.9
X12.0
X10.1
X9.8
X8.0
X7.1
X5.9
X5.0
X4.5
X3.6
X3.2
X3.0
Other M/X flares that day
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.
← M5.0 1982-12-17X1.1 1982-12-18 →
About this page
A X1.2 flare that began 1982-12-18 08:22 UTC; No. 34 of 3,850 C-class-or-larger flares in 1982.