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Sunspots and active regions — April 22, 2004

April 22, 2004

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Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on April 22, 2004. Coordinates are given as of the end of the day.
Group ID Location Number of sunspots Area (msh) Type CM Passage Disappearance (W90) Reappearance (W270)
№ 598 S05 W28 06 0020 Beta Apr 21, 2004 Apr 28, 2004 May 11, 2004
№ 597 S06 W70 04 0050 Beta Apr 18, 2004 Apr 24, 2004 May 8, 2004
№ 596 S07 E21 22 0340 Beta-Gamma Apr 24, 2004 May 1, 2004 May 15, 2004
№ 595 S06 E02 11 0050 Beta Apr 23, 2004 Apr 30, 2004 May 13, 2004
№ 593 S18 W49 05 0030 Beta Apr 19, 2004 Apr 26, 2004 May 10, 2004

Solar cycle progression

The average monthly sunspot number (SSN) from January 1975 to April 2004. The gray background is the average SSN index.