Solar Flare WatchHome › Flare history › 2002
X2.1 solar flare on 2002-05-20
ClassX2.1NOAA report
Peak15:272002-05-20 UTC
Duration10 min
Peak flux2.1e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 190 / 491 |
| Rank in year | 5 / 2553 |
| Other M/X flares that day | 2 |
| M/X flares that month | 15 |
| Solar cycle | Cycle 23 |
| Position on disk | S21E65 |
| Active region | AR 9961 (13 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
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.
← M5.0 2002-05-20X1.5 2002-07-03 →
About this page
A X2.1 flare that began 2002-05-20 15:21 UTC; No. 5 of 2,553 C-class-or-larger flares in 2002.