Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 12, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9616 | S12 | E81 | 01 | 0040 | Alpha | Sep 19, 2001 | Sep 26, 2001 | Oct 9, 2001 |
| № 9612 | N22 | W12 | 10 | 0080 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9611 | N09 | W75 | 06 | 0390 | Beta | Sep 7, 2001 | Sep 14, 2001 | Sep 28, 2001 |
| № 9610 | S14 | E09 | 37 | 0540 | Beta-Gamma | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S27 | W06 | 44 | 1030 | Beta-Gamma-Delta | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9607 | S17 | W23 | 09 | 0150 | Beta | Sep 11, 2001 | Sep 18, 2001 | Oct 2, 2001 |
| № 9606 | S19 | W49 | 03 | 0150 | Beta | Sep 9, 2001 | Sep 16, 2001 | Sep 30, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to September 2001. The gray background is the average SSN index.
