Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 15, 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 | E10 | 06 | 0020 | Beta | Sep 17, 2001 | Sep 23, 2001 | Oct 7, 2001 |
| № 9618 | S22 | W38 | 07 | 0030 | Beta | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9617 | N11 | E45 | 06 | 0070 | Beta | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9616 | S10 | E46 | 21 | 0360 | Beta-Gamma | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9612 | N18 | W53 | 13 | 0050 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 2, 2001 |
| № 9610 | S14 | W29 | 48 | 0400 | Beta-Gamma | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S28 | W42 | 34 | 1020 | Beta-Gamma | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9607 | S18 | W61 | 01 | 0070 | 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.
