Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9574 | S03 | E06 | 09 | 0030 | Beta | Aug 12, 2001 | Aug 19, 2001 | Sep 2, 2001 |
| № 9573 | S09 | E48 | 08 | 0180 | Beta | Aug 15, 2001 | Aug 22, 2001 | Sep 5, 2001 |
| № 9571 | N07 | E27 | 01 | 0040 | Alpha | Aug 14, 2001 | Aug 21, 2001 | Sep 3, 2001 |
| № 9570 | S11 | E08 | 02 | 0170 | Beta | Aug 12, 2001 | Aug 19, 2001 | Sep 2, 2001 |
| № 9569 | S18 | W52 | 08 | 0190 | Beta | Aug 8, 2001 | Aug 15, 2001 | Aug 28, 2001 |
| № 9566 | N17 | W56 | 09 | 0190 | Beta-Gamma | Aug 8, 2001 | Aug 14, 2001 | Aug 28, 2001 |
| № 9563 | N25 | W72 | 12 | 0290 | Beta-Gamma | Aug 6, 2001 | Aug 13, 2001 | Aug 27, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to August 2001. The gray background is the average SSN index.
