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X1.1 solar flare on 2003-10-23

ClassX1.1NOAA report

Peak20:042003-10-23 UTC

Duration24 min

Peak flux1.1e-04W/m²

Comparison	Value
Rank among X flares (1975 – Jun 2017)	381 / 491
Rank in year	20 / 1496
Other M/X flares that day	4
M/X flares that month	44
Solar cycle	Cycle 23
Position on disk	S17E84
Active region	AR 10486 (43 flares)

Compared with the strongest flares of 2003

X28.0 11-04X28.0

X17.2 10-28X17.2

X10.0 10-29X10.0

X8.3 11-02X8.3

X5.4 10-23X5.4

X3.9 11-03X3.9

X3.6 05-28X3.6

X2.7 11-03X2.7

X1.7 06-09X1.7

X1.6 06-11X1.6

X1.5 03-17X1.5

X1.5 03-18X1.5

Other M/X flares that day

Begin	Peak	Min	Class	Location	Region
02:35	02:41	9	M2.4	N03E15	10484
07:02	07:08	8	M3.2	N04E13	10484
08:19	08:35	30	X5.4	S21E88	10486
10:49	10:53	6	M2.7	–	10484

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.

← X5.4 2003-10-23 M7.6 2003-10-24 →

About this page

A X1.1 flare that began 2003-10-23 19:50 UTC; No. 20 of 1,496 C-class-or-larger flares in 2003.