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X1.7 solar flare on 2005-09-13
ClassX1.7NOAA report
Peak23:222005-09-13 UTC
Duration15 min
Peak flux1.7e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 243 / 491 |
| Rank in year | 10 / 699 |
| Other M/X flares that day | 2 |
| M/X flares that month | 36 |
| Solar cycle | Cycle 23 |
| Active region | AR 10808 (77 flares) |
Compared with the strongest flares of 2005
X17.0
X7.1
X6.2
X5.4
X3.8
X3.6
X2.6
X2.1
X1.7
X1.7
X1.5
X1.3
Other M/X flares that day
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.
← X1.5 2005-09-13X1.1 2005-09-15 →
About this page
A X1.7 flare that began 2005-09-13 23:15 UTC; No. 10 of 699 C-class-or-larger flares in 2005.