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X1.0 solar flare on 2004-08-13
ClassX1.0NOAA report
Peak18:122004-08-13 UTC
Duration8 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 429 / 491 |
| Rank in year | 12 / 1046 |
| Other M/X flares that day | 4 |
| M/X flares that month | 28 |
| Solar cycle | Cycle 23 |
| Position on disk | S13W23 |
| Active region | AR 10656 (125 flares) |
Compared with the strongest flares of 2004
X3.6
X2.5
X2.0
X1.8
X1.8
X1.6
X1.3
X1.2
X1.1
X1.1
X1.0
X1.0
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 06:36 | 07:29 | 62 | M1.2 | S15W15 | 10656 | |
| 12:02 | 12:09 | 10 | M1.1 | S14W21 | 10656 | |
| 23:14 | 23:43 | 32 | M3.0 | S13W26 | 10656 | |
| 23:46 | 23:50 | 8 | M2.8 | S13W26 | 10656 |
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.
← M7.1 2004-07-25M7.4 2004-08-14 →
About this page
A X1.0 flare that began 2004-08-13 18:07 UTC; No. 12 of 1,046 C-class-or-larger flares in 2004.