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X12.0 solar flare on 1991-06-11
ClassX12.0NOAA report
Peak02:291991-06-11 UTC
Duration71 min
Peak flux1.2e-03W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 15 / 491 |
| Rank in year | 4 / 3297 |
| Other M/X flares that day | 5 |
| M/X flares that month | 72 |
| Solar cycle | Cycle 22 |
| Position on disk | N31W17 |
| 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 |
|---|---|---|---|---|---|---|
| 01:21 | 01:34 | 33 | M1.9 | – | – | |
| 03:41 | 03:41 | 132 | M2.2 | N29W11 | 6659 | |
| 11:57 | 11:57 | 7 | M1.1 | S14W22 | 6666 | |
| 17:30 | 17:34 | 8 | M1.1 | N32W29 | 6659 | |
| 20:05 | 20:17 | 200 | M5.3 | N26W42 | 6659 |
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.
← M6.4 1991-06-10M5.3 1991-06-11 →
About this page
A X12.0 flare that began 1991-06-11 02:09 UTC; No. 4 of 3,297 C-class-or-larger flares in 1991.