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Sunspots and active regions — December 17, 1998

December 17, 1998

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Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on December 17, 1998. 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)
№ 8414 N21 E46 04 0010 BETA Dec 22, 1998 Dec 29, 1998 Jan 11, 1999
№ 8412 S15 W70 01 0000 ALPHA Dec 13, 1998 Dec 20, 1998 Jan 2, 1999
№ 8411 S28 W03 02 0010 BETA Dec 18, 1998 Dec 25, 1998 Jan 8, 1999
№ 8410 N23 E06 02 0060 BETA Dec 19, 1998 Dec 26, 1998 Jan 8, 1999
№ 8409 S27 W41 26 0250 BETA-GAMMA Dec 15, 1998 Dec 22, 1998 Jan 5, 1999
№ 8408 S17 W56 12 0220 BETA Dec 14, 1998 Dec 21, 1998 Jan 4, 1999
№ 8406 S27 W51 01 0020 ALPHA Dec 14, 1998 Dec 21, 1998 Jan 4, 1999

Solar cycle progression

The average monthly sunspot number (SSN) from January 1969 to December 1998. The gray background is the average SSN index.