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Solar flares in August 2004

C-class111

M-class26

X-class2

LargestX1.82004-08-18

Sunspot number69.6NOAA SWPC

Flares per day (C and above)

M/X flares per day

Same month a year earlier

Month	C	M	X	Largest
August 2003	87	4	0	M2.7
August 2004	111	26	2	X1.8

Top 15 flares

Date	Begin	Peak	Min	Class	Location	Region
2004-08-18	17:29	17:40	25	X1.8	S14W90	10656
2004-08-13	18:07	18:12	8	X1.0	S13W23	10656
2004-08-15	12:34	12:41	9	M9.4	S13W46	10656
2004-08-14	05:36	05:44	16	M7.4	S13W29	10656
2004-08-14	13:31	13:43	19	M5.6	S13W34	10656
2004-08-14	09:52	10:07	25	M3.2	S13W32	10656
2004-08-13	23:14	23:43	32	M3.0	S13W26	10656
2004-08-19	06:35	07:01	43	M3.0	S13W90	10656
2004-08-13	23:46	23:50	8	M2.8	S13W26	10656
2004-08-15	11:23	11:32	25	M2.6	S13W46	10656
2004-08-14	04:10	04:14	7	M2.4	S13W29	10656
2004-08-17	19:26	19:37	22	M2.4	S15W90	10656
2004-08-14	07:51	07:56	8	M2.3	S14W31	10656
2004-08-19	13:29	13:51	47	M2.1	S13W90	10656
2004-08-17	21:12	21:21	27	M1.8	S15W90	10656

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.

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139 flares of class C or larger in August 2004; by M/X count it ranks 112 of 565 months.