Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 1, 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 | E30 | 45 | 0760 | Beta-Gamma | Sep 4, 2001 | Sep 11, 2001 | Sep 25, 2001 |
| № 9599 | S18 | E09 | 14 | 0190 | Beta | Sep 3, 2001 | Sep 10, 2001 | Sep 23, 2001 |
| № 9596 | N22 | W01 | 01 | 0150 | Alpha | Sep 2, 2001 | Sep 9, 2001 | Sep 23, 2001 |
| № 9595 | N17 | W72 | 03 | 0030 | Beta | Aug 28, 2001 | Sep 4, 2001 | Sep 17, 2001 |
| № 9591 | S20 | W41 | 17 | 0400 | Beta-Gamma-Delta | Aug 30, 2001 | Sep 6, 2001 | Sep 20, 2001 |
| № 9590 | S29 | W70 | 02 | 0150 | Alpha | Aug 28, 2001 | Sep 4, 2001 | Sep 18, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to September 2001. The gray background is the average SSN index.
