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X1.7 solar flare on 1991-03-08
ClassX1.7NOAA report
Peak20:291991-03-08 UTC
Duration13 min
Peak flux1.7e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 235 / 491 |
| Rank in year | 31 / 3297 |
| Other M/X flares that day | 3 |
| M/X flares that month | 123 |
| Solar cycle | Cycle 22 |
| Position on disk | S24E43 |
| Active region | AR 6538 (60 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 |
|---|---|---|---|---|---|---|
| 01:41 | 02:32 | 87 | M1.0 | S24E54 | 6538 | |
| 11:33 | 11:45 | 46 | M1.5 | S26E49 | 6538 | |
| 16:12 | 16:22 | 29 | M1.2 | S22E50 | 6538 |
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.
← X2.5 1991-03-07X1.7 1991-03-12 →
About this page
A X1.7 flare that began 1991-03-08 20:20 UTC; No. 31 of 3,297 C-class-or-larger flares in 1991.