Solar Flare WatchHome › Flare history › 2001
M5.5 solar flare on 2001-04-01
ClassM5.5NOAA report
Peak12:172001-04-01 UTC
Duration149 min
Peak flux5.5e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 49 / 2429 |
| Other M/X flares that day | 3 |
| M/X flares that month | 46 |
| 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 |
|---|---|---|---|---|---|---|
| 19:44 | 19:49 | 12 | M4.0 | N17W57 | 9393 | |
| 22:47 | 23:01 | 22 | M1.2 | N12W61 | 9393 | |
| 23:48 | 00:03 | 19 | M1.0 | – | – |
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.
← X1.7 2001-03-29X1.4 2001-04-02 →
About this page
A M5.5 flare that began 2001-04-01 10:55 UTC; No. 49 of 2,429 C-class-or-larger flares in 2001.