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X1.1 solar flare on 1988-12-18
ClassX1.1NOAA report
Peak17:141988-12-18 UTC
Duration114 min
Peak flux1.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 362 / 491 |
| Rank in year | 13 / 1845 |
| Other M/X flares that day | 2 |
| M/X flares that month | 49 |
| Solar cycle | Cycle 22 |
| Position on disk | S31W40 |
| Active region | AR 5273 (14 flares) |
Compared with the strongest flares of 1988
X5.6
X4.7
X3.2
X2.5
X2.4
X1.6
X1.4
X1.4
X1.3
X1.2
X1.1
X1.1
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 09:13 | 09:15 | 33 | M1.0 | N22E07 | 5278 | |
| 16:35 | 16:41 | 23 | M1.4 | S22E19 | 5282 |
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.
← X4.7 1988-12-16M7.3 1988-12-20 →
About this page
A X1.1 flare that began 1988-12-18 16:51 UTC; No. 13 of 1,845 C-class-or-larger flares in 1988.