Solar Flare WatchHome › Flare history › 2003
X17.2 solar flare on 2003-10-28
ClassX17.2NOAA report
Peak11:102003-10-28 UTC
Duration93 min
Peak flux1.7e-03W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 4 / 491 |
| Rank in year | 2 / 1496 |
| Other M/X flares that day | 0 |
| M/X flares that month | 44 |
| Solar cycle | Cycle 23 |
| Position on disk | S16E08 |
| Active region | AR 10486 (43 flares) |
Compared with the strongest flares of 2003
X28.0
X17.2
X10.0
X8.3
X5.4
X3.9
X3.6
X2.7
X1.7
X1.6
X1.5
X1.5
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.
← M6.7 2003-10-27X10.0 2003-10-29 →
About this page
A X17.2 flare that began 2003-10-28 09:51 UTC; No. 2 of 1,496 C-class-or-larger flares in 2003.