Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 15, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9580 | N24 | E74 | 01 | 0090 | Alpha | Aug 22, 2001 | Aug 29, 2001 | Sep 11, 2001 |
| № 9579 | S17 | W09 | 06 | 0020 | Beta | Aug 15, 2001 | Aug 22, 2001 | Sep 5, 2001 |
| № 9578 | S08 | W37 | 07 | 0040 | Beta | Aug 13, 2001 | Aug 20, 2001 | Sep 2, 2001 |
| № 9575 | N11 | E35 | 05 | 0140 | Beta | Aug 19, 2001 | Aug 25, 2001 | Sep 8, 2001 |
| № 9574 | S04 | W50 | 19 | 0300 | Beta-Gamma | Aug 12, 2001 | Aug 19, 2001 | Sep 1, 2001 |
| № 9573 | S08 | W07 | 12 | 0070 | Beta | Aug 15, 2001 | Aug 22, 2001 | Sep 5, 2001 |
| № 9571 | N07 | W28 | 01 | 0040 | Alpha | Aug 14, 2001 | Aug 21, 2001 | Sep 3, 2001 |
| № 9570 | S10 | W46 | 02 | 0170 | Beta | Aug 12, 2001 | Aug 19, 2001 | Sep 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to August 2001. The gray background is the average SSN index.
