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Sunspots and active regions — October 20, 1999

October 20, 1999

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Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on October 20, 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)
№ 8737 S15 E12 08 0050 BETA Oct 22, 1999 Oct 29, 1999 Nov 12, 1999
№ 8736 S21 E05 02 0000 BETA Oct 22, 1999 Oct 28, 1999 Nov 11, 1999
№ 8735 N19 W08 04 0020 BETA Oct 21, 1999 Oct 27, 1999 Nov 10, 1999
№ 8732 N21 W55 29 0190 BETA-GAMMA Oct 17, 1999 Oct 24, 1999 Nov 7, 1999
№ 8731 N13 W46 63 0640 BETA-GAMMA Oct 18, 1999 Oct 24, 1999 Nov 7, 1999
№ 8728 N24 W72 03 0130 BETA Oct 16, 1999 Oct 23, 1999 Nov 5, 1999

Solar cycle progression

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