Solar Flare WatchHome › Flare history › 2001
M8.1 solar flare on 2001-09-17
ClassM8.1NOAA report
Peak15:502001-09-17 UTC
Duration10 min
Peak flux8.1e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 28 / 2429 |
| Other M/X flares that day | 3 |
| M/X flares that month | 51 |
| Solar cycle | Cycle 23 |
| Position on disk | S32W73 |
| Active region | AR 9608 (38 flares) |
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 |
|---|---|---|---|---|---|---|
| 08:18 | 08:25 | 16 | M1.5 | S14E04 | 9616 | |
| 21:01 | 21:08 | 10 | M1.0 | S11W06 | 9616 | |
| 21:32 | 21:46 | 23 | M1.0 | S31W73 | 9608 |
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.
← M5.6 2001-09-16X2.6 2001-09-24 →
About this page
A M8.1 flare that began 2001-09-17 15:44 UTC; No. 28 of 2,429 C-class-or-larger flares in 2001.