Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9617 | N10 | E71 | 05 | 0180 | Beta | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9616 | S11 | E69 | 09 | 0260 | Beta | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9612 | N22 | W26 | 10 | 0070 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9611 | N09 | W88 | 07 | 0210 | Beta | Sep 7, 2001 | Sep 14, 2001 | Sep 28, 2001 |
| № 9610 | S13 | W05 | 60 | 0580 | Beta-Gamma | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S26 | W18 | 48 | 1000 | Beta-Gamma-Delta | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9607 | S16 | W39 | 07 | 0120 | Beta | Sep 11, 2001 | Sep 18, 2001 | Oct 2, 2001 |
| № 9606 | S17 | W64 | 02 | 0130 | Alpha | 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.
