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Sunspots and active regions — September 11, 2021

September 11, 2021

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Sunspots and active regions

The following active regions with sunspot groups were visible on the Sun on September 11, 2021. 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)
№ 2869 S34 W14 09 0060 Beta Sep 11, 2021 Sep 18, 2021 Oct 2, 2021
№ 2868 S22 W34 20 0250 Beta Sep 9, 2021 Sep 16, 2021 Sep 30, 2021
№ 2866 S18 W19 17 0460 Beta Sep 11, 2021 Sep 17, 2021 Oct 1, 2021
№ 2864 N24 W76 02 0080 Beta Sep 6, 2021 Sep 13, 2021 Sep 27, 2021
№ 2863 S15 W81 01 0070 Alpha Sep 6, 2021 Sep 13, 2021 Sep 26, 2021

Solar cycle progression

The average monthly sunspot number (SSN) from January 1992 to September 2021. The gray background is the average SSN index.