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X3.4 solar flare on 2001-12-28
ClassX3.4NOAA report
Peak20:452001-12-28 UTC
Duration90 min
Peak flux3.4e-04W/m²
| Comparison | Value |
|---|---|
| Rank among X flares (1975 – Jun 2017) | 92 / 491 |
| Rank in year | 6 / 2429 |
| Other M/X flares that day | 3 |
| M/X flares that month | 50 |
| Solar cycle | Cycle 23 |
Compared with the strongest flares of 2001
X20.0
X14.4
X6.2
X5.6
X5.3
X3.4
X2.8
X2.6
X2.3
X2.0
X1.7
X1.6
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 03:42 | 03:51 | 14 | M4.7 | N04W90 | 9742 | |
| 06:47 | 06:55 | 19 | M1.0 | S07E10 | 9754 | |
| 12:10 | 12:30 | 49 | M1.3 | S12W77 | 9748 |
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 2001-12-26M9.3 2001-12-29 →
About this page
A X3.4 flare that began 2001-12-28 20:02 UTC; No. 6 of 2,429 C-class-or-larger flares in 2001.