Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9601 | N14 | E51 | 28 | 0700 | Beta-Gamma-Delta | Sep 5, 2001 | Sep 12, 2001 | Sep 25, 2001 |
| № 9599 | S18 | E26 | 19 | 0220 | Beta-Gamma | Sep 3, 2001 | Sep 10, 2001 | Sep 23, 2001 |
| № 9597 | N19 | W00 | 03 | 0010 | Beta | Sep 1, 2001 | Sep 8, 2001 | Sep 21, 2001 |
| № 9596 | N22 | E16 | 01 | 0190 | Alpha | Sep 2, 2001 | Sep 9, 2001 | Sep 23, 2001 |
| № 9591 | S20 | W31 | 25 | 0490 | Beta-Gamma-Delta | Aug 29, 2001 | Sep 5, 2001 | Sep 19, 2001 |
| № 9590 | S30 | W54 | 02 | 0130 | Alpha | Aug 28, 2001 | Sep 4, 2001 | Sep 18, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to August 2001. The gray background is the average SSN index.
