Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9619 | N16 | W04 | 08 | 0040 | Beta | Sep 17, 2001 | Sep 23, 2001 | Oct 7, 2001 |
| № 9618 | S20 | W51 | 06 | 0060 | Beta | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9617 | N08 | E32 | 07 | 0060 | Beta | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9616 | S12 | E32 | 26 | 0320 | Beta-Gamma | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9612 | N20 | W66 | 10 | 0110 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 2, 2001 |
| № 9610 | S13 | W44 | 24 | 0430 | Beta-Gamma | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S28 | W52 | 20 | 0620 | Beta-Gamma | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9607 | S17 | W76 | 02 | 0060 | Alpha | Sep 11, 2001 | Sep 18, 2001 | Oct 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to September 2001. The gray background is the average SSN index.
