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Sunspots and active regions — April 21, 2023

April 21, 2023

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Home Sunspots and active regions April 21, 2023

Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on April 21, 2023. 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)
№ 3284 S08 E30 02 0010 Alpha Apr 24, 2023 May 1, 2023 May 15, 2023
№ 3283 S20 W01 04 0050 Beta Apr 22, 2023 Apr 29, 2023 May 13, 2023
№ 3282 N12 W28 23 0380 Beta Apr 20, 2023 Apr 27, 2023 May 10, 2023
№ 3281 S22 W22 06 0060 Beta Apr 20, 2023 Apr 27, 2023 May 11, 2023
№ 3279 S19 W39 01 0010 Alpha Apr 19, 2023 Apr 26, 2023 May 10, 2023
№ 3276 S21 W33 01 0010 Alpha Apr 19, 2023 Apr 26, 2023 May 10, 2023

Solar cycle progression

The average monthly sunspot number (SSN) from January 1994 to April 2023. The gray background is the average SSN index.