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X10.0 solar flare on 1991-06-09
ClassX10.0NOAA report
Peak01:401991-06-09 UTC
Duration167 min
Peak flux1.0e-03W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 20 / 491 |
| Rank in year | 7 / 3297 |
| Other M/X flares that day | 4 |
| M/X flares that month | 72 |
| Solar cycle | Cycle 22 |
| Position on disk | N34E04 |
| 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 |
|---|---|---|---|---|---|---|
| 05:48 | 05:50 | 44 | M1.9 | N27W04 | 6659 | |
| 09:45 | 09:53 | 35 | M1.2 | N28W04 | 6659 | |
| 13:00 | 13:18 | 43 | M1.2 | N27W06 | 6659 | |
| 20:04 | 20:04 | 14 | M1.3 | N31W07 | 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.
← X12.0 1991-06-06M6.4 1991-06-10 →
About this page
A X10.0 flare that began 1991-06-09 01:37 UTC; No. 7 of 3,297 C-class-or-larger flares in 1991.