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M5.0 solar flare on 2002-05-20

ClassM5.0NOAA report

Peak10:532002-05-20 UTC

Duration7 min

Peak flux5.0e-05W/m²

Comparison	Value
Rank in year	29 / 2553
Other M/X flares that day	2
M/X flares that month	15
Solar cycle	Cycle 23
Active region	AR 9961 (13 flares)

Compared with the strongest flares of 2002

X4.8 07-23X4.8

X3.3 07-20X3.3

X3.1 08-24X3.1

X3.0 07-15X3.0

X2.1 05-20X2.1

X1.8 07-18X1.8

X1.5 04-21X1.5

X1.5 07-03X1.5

X1.5 08-30X1.5

X1.2 10-31X1.2

X1.0 08-03X1.0

X1.0 08-21X1.0

Other M/X flares that day

Date	Begin	Peak	Min	Class	Location	Region
	10:14	10:29	20	M4.7	–	9961
	15:21	15:27	10	X2.1	S21E65	9961

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.

← X1.5 2002-04-21 X2.1 2002-05-20 →

About this page

A M5.0 flare that began 2002-05-20 10:49 UTC; No. 29 of 2,553 C-class-or-larger flares in 2002.