Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 9619 | N17 | E23 | 04 | 0020 | Beta | Sep 17, 2001 | Sep 23, 2001 | Oct 7, 2001 |
| № 9618 | S21 | W24 | 06 | 0030 | Beta | Sep 13, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9617 | N11 | E58 | 06 | 0120 | Beta | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9616 | S10 | E57 | 16 | 0320 | Beta-Gamma | Sep 19, 2001 | Sep 26, 2001 | Oct 10, 2001 |
| № 9612 | N19 | W38 | 12 | 0070 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9610 | S13 | W16 | 49 | 0510 | Beta-Gamma | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S25 | W31 | 34 | 0960 | Beta-Gamma | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9607 | S16 | W49 | 05 | 0080 | Beta | Sep 11, 2001 | Sep 18, 2001 | Oct 2, 2001 |
| № 9606 | S17 | W77 | 01 | 0090 | Alpha | Sep 9, 2001 | Sep 16, 2001 | Sep 30, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, September. Gray background - average solar cycle.
