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X2.7 solar flare on 1981-07-19

ClassX2.7NOAA report

Peak05:341981-07-19 UTC

Duration65 min

Peak flux2.7e-04W/m²

Comparison	Value
Rank among X flares (1975 – Jun 2017)	127 / 491
Rank in year	8 / 4022
Other M/X flares that day	2
M/X flares that month	74
Solar cycle	Cycle 21
Position on disk	S37W56
Active region	AR 3204 (23 flares)

Compared with the strongest flares of 1981

X5.9 04-24X5.9

X5.5 04-27X5.5

X4.0 02-26X4.0

X3.6 10-07X3.6

X3.5 07-26X3.5

X3.1 10-12X3.1

X3.0 10-14X3.0

X2.7 07-19X2.7

X2.6 08-12X2.6

X2.5 04-10X2.5

X2.4 02-20X2.4

X2.3 02-24X2.3

Other M/X flares that day

Date	Begin	Peak	Min	Class	Location	Region
	01:53	02:00	90	M3.3	S09E66	3221
	04:08	04:30	43	M9.1	S08E66	3221

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.

← M9.1 1981-07-19 M5.4 1981-07-20 →

About this page

A X2.7 flare that began 1981-07-19 05:32 UTC; No. 8 of 4,022 C-class-or-larger flares in 1981.