Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9615 | N11 | E33 | 01 | 0001 | Alpha | Sep 15, 2001 | Sep 22, 2001 | Oct 5, 2001 |
| № 9612 | N21 | W03 | 08 | 0040 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9611 | N10 | W67 | 09 | 0370 | Beta | Sep 7, 2001 | Sep 14, 2001 | Sep 28, 2001 |
| № 9610 | S13 | E19 | 28 | 0540 | Beta | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S27 | E04 | 52 | 1110 | Beta-Gamma-Delta | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9607 | S17 | W12 | 20 | 0200 | Beta-Gamma | Sep 11, 2001 | Sep 18, 2001 | Oct 2, 2001 |
| № 9606 | S18 | W39 | 18 | 0210 | Beta | Sep 9, 2001 | Sep 16, 2001 | Sep 30, 2001 |
| № 9605 | S19 | W48 | 01 | 0020 | Alpha | Sep 9, 2001 | Sep 15, 2001 | Sep 29, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to September 2001. The gray background is the average SSN index.
