Solar Flare WatchHome › Flare history › 1991
X1.0 solar flare on 1991-01-30
ClassX1.0NOAA report
Peak09:001991-01-30 UTC
Duration96 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 410 / 491 |
| Rank in year | 45 / 3297 |
| Other M/X flares that day | 4 |
| M/X flares that month | 36 |
| Solar cycle | Cycle 22 |
| Position on disk | S08W34 |
| Active region | AR 6466 (16 flares) |
Compared with the strongest flares of 1991
X12.0
X12.0
X12.0
X12.0
X12.0
X10.0
X10.0
X9.4
X7.1
X6.1
X5.5
X5.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 13:50 | 14:19 | 47 | M1.0 | S14E21 | 6471 | |
| 14:07 | 14:45 | 51 | M1.2 | S10W39 | 6466 | |
| 17:56 | 17:57 | 8 | M1.0 | S16W25 | 6469 | |
| 22:17 | 22:20 | 18 | M1.0 | S15W23 | 6469 |
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.
← X1.9 1991-01-27X1.3 1991-01-31 →
About this page
A X1.0 flare that began 1991-01-30 08:49 UTC; No. 45 of 3,297 C-class-or-larger flares in 1991.