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Sunspots and active regions — September 22, 1999

September 22, 1999

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Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on September 22, 1999. 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)
№ 8706 N22 E53 03 0110 BETA Sep 27, 1999 Oct 4, 1999 Oct 18, 1999
№ 8704 S22 E16 09 0130 BETA Sep 24, 1999 Oct 1, 1999 Oct 15, 1999
№ 8702 N24 W40 03 0000 BETA Sep 20, 1999 Sep 27, 1999 Oct 11, 1999
№ 8700 N13 W33 16 0040 BETA Sep 21, 1999 Sep 27, 1999 Oct 11, 1999
№ 8695 N22 W70 01 0000 ALPHA Sep 18, 1999 Sep 25, 1999 Oct 8, 1999

Solar cycle progression

The average monthly sunspot number (SSN) from January 1970 to September 1999. The gray background is the average SSN index.