Solar Flare WatchHome › Flare history › 1991
X1.0 solar flare on 1991-05-29
ClassX1.0NOAA report
Peak23:431991-05-29 UTC
Duration149 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 415 / 491 |
| Rank in year | 50 / 3297 |
| Other M/X flares that day | 4 |
| M/X flares that month | 41 |
| Solar cycle | Cycle 22 |
| Position on disk | N05E38 |
| Active region | AR 6654 (32 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 |
|---|---|---|---|---|---|---|
| 02:55 | 03:01 | 23 | M1.3 | N05E45 | 6654 | |
| 04:42 | 04:47 | 33 | M1.7 | N08E48 | 6654 | |
| 12:07 | 12:10 | 24 | M4.3 | N08E43 | 6654 | |
| 16:29 | 16:29 | 80 | M2.7 | S08E35 | 6652 |
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.
← M5.3 1991-05-28M8.2 1991-05-30 →
About this page
A X1.0 flare that began 1991-05-29 22:14 UTC; No. 50 of 3,297 C-class-or-larger flares in 1991.