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Sunspots and active regions — March 21, 2001

March 21, 2001

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Home Sunspots and active regions March 21, 2001

Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on March 21, 2001. 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)
№ 9390 N14 E75 02 0040 Beta Mar 28, 2001 Apr 3, 2001 Apr 17, 2001
№ 9389 S12 E77 01 0030 Alpha Mar 28, 2001 Apr 3, 2001 Apr 17, 2001
№ 9388 N14 W47 03 0030 Beta Mar 18, 2001 Mar 25, 2001 Apr 8, 2001
№ 9387 N10 E49 05 0090 Beta Mar 26, 2001 Apr 1, 2001 Apr 15, 2001
№ 9384 N14 W72 04 0080 Beta Mar 16, 2001 Mar 23, 2001 Apr 6, 2001
№ 9373 S07 W69 23 0270 Beta-Gamma Mar 17, 2001 Mar 23, 2001 Apr 6, 2001

Solar cycle progression

The average monthly sunspot number (SSN) from January 1972 to March 2001. The gray background is the average SSN index.