Solar Flare WatchHome › Flare history › 2002
X1.0 solar flare on 2002-08-21
ClassX1.0NOAA report
Peak05:342002-08-21 UTC
Duration8 min
Peak flux1.0e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 427 / 491 |
| Rank in year | 12 / 2553 |
| Other M/X flares that day | 1 |
| M/X flares that month | 47 |
| Solar cycle | Cycle 23 |
| Position on disk | S12W51 |
| Active region | AR 10069 (74 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 |
|---|---|---|---|---|---|---|
| 01:35 | 01:41 | 10 | M1.4 | S11W47 | 10069 |
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 2002-08-20M5.4 2002-08-22 →
About this page
A X1.0 flare that began 2002-08-21 05:28 UTC; No. 12 of 2,553 C-class-or-larger flares in 2002.