Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9597 | N17 | E37 | 02 | 0010 | Beta | Sep 1, 2001 | Sep 8, 2001 | Sep 21, 2001 |
| № 9596 | N22 | E56 | 01 | 0130 | Alpha | Sep 2, 2001 | Sep 9, 2001 | Sep 23, 2001 |
| № 9591 | S19 | E07 | 43 | 0740 | Beta-Gamma-Delta | Aug 29, 2001 | Sep 5, 2001 | Sep 19, 2001 |
| № 9590 | S29 | W13 | 03 | 0180 | Alpha | Aug 28, 2001 | Sep 4, 2001 | Sep 18, 2001 |
| № 9587 | S10 | W76 | 12 | 0210 | Beta | Aug 23, 2001 | Aug 30, 2001 | Sep 13, 2001 |
| № 9585 | N12 | W70 | 07 | 0050 | Beta | Aug 24, 2001 | Aug 30, 2001 | Sep 13, 2001 |
| № 9580 | N23 | W93 | 01 | 0080 | Alpha | Aug 22, 2001 | Aug 29, 2001 | Sep 11, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to August 2001. The gray background is the average SSN index.
