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X1.8 solar flare on 2002-07-18
ClassX1.8NOAA report
Peak07:442002-07-18 UTC
Duration25 min
Peak flux1.8e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 225 / 491 |
| Rank in year | 6 / 2553 |
| Other M/X flares that day | 1 |
| M/X flares that month | 35 |
| Solar cycle | Cycle 23 |
| Position on disk | N19W30 |
| Active region | AR 10030 (46 flares) |
Compared with the strongest flares of 2002
X4.8
X3.3
X3.1
X3.0
X2.1
X1.8
X1.5
X1.5
X1.5
X1.2
X1.0
X1.0
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 03:22 | 03:37 | 18 | M2.2 | N20W27 | 10030 |
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.
← M8.5 2002-07-17X3.3 2002-07-20 →
About this page
A X1.8 flare that began 2002-07-18 07:24 UTC; No. 6 of 2,553 C-class-or-larger flares in 2002.