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X12.0 solar flare on 1991-06-01
ClassX12.0NOAA report
Peak15:291991-06-01 UTC
Duration65 min
Peak flux1.2e-03W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 12 / 491 |
| Rank in year | 1 / 3297 |
| Other M/X flares that day | 3 |
| M/X flares that month | 72 |
| Solar cycle | Cycle 22 |
| Position on disk | N25E90 |
| Active region | AR 6659 (72 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 |
|---|---|---|---|---|---|---|
| 02:51 | 03:02 | 11 | M1.0 | N09E11 | 6654 | |
| 04:00 | 04:02 | 46 | M2.3 | N10W01 | 6654 | |
| 11:44 | 11:46 | 37 | M1.0 | S15W23 | 6648 |
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.
← M8.2 1991-05-30M5.2 1991-06-02 →
About this page
A X12.0 flare that began 1991-06-01 15:09 UTC; No. 1 of 3,297 C-class-or-larger flares in 1991.