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X5.4 solar flare on 2005-09-08

ClassX5.4NOAA report

Peak21:062005-09-08 UTC

Duration25 min

Peak flux5.4e-04W/m²

Comparison	Value
Rank among X flares (1975 – Jun 2017)	51 / 491
Rank in year	4 / 699
Other M/X flares that day	2
M/X flares that month	36
Solar cycle	Cycle 23
Position on disk	S12E75
Active region	AR 10808 (77 flares)

Compared with the strongest flares of 2005

X17.0 09-07X17.0

X7.1 01-20X7.1

X6.2 09-09X6.2

X5.4 09-08X5.4

X3.8 01-17X3.8

X3.6 09-09X3.6

X2.6 01-15X2.6

X2.1 09-10X2.1

X1.7 01-01X1.7

X1.7 09-13X1.7

X1.5 09-13X1.5

X1.3 01-19X1.3

Other M/X flares that day

Date	Begin	Peak	Min	Class	Location	Region
	16:49	17:03	22	M2.1	S12E74	10808
	20:23	20:29	18	M2.1	S12E70	10808

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.

← X17.0 2005-09-07 X1.1 2005-09-09 →

About this page

A X5.4 flare that began 2005-09-08 20:52 UTC; No. 4 of 699 C-class-or-larger flares in 2005.