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) | |
|---|---|---|---|---|---|---|---|---|
| № 9615 | N11 | E49 | 01 | 0010 | Alpha | Sep 15, 2001 | Sep 21, 2001 | Oct 5, 2001 |
| № 9614 | N15 | W34 | 03 | 0010 | Alpha | Sep 8, 2001 | Sep 15, 2001 | Sep 29, 2001 |
| № 9613 | S17 | W83 | 04 | 0040 | Beta | Sep 5, 2001 | Sep 12, 2001 | Sep 25, 2001 |
| № 9612 | N21 | E12 | 13 | 0040 | Beta | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9611 | N10 | W51 | 10 | 0170 | Beta | Sep 7, 2001 | Sep 14, 2001 | Sep 28, 2001 |
| № 9610 | S14 | E34 | 26 | 0410 | Beta | Sep 14, 2001 | Sep 20, 2001 | Oct 4, 2001 |
| № 9608 | S27 | E18 | 60 | 1050 | Beta-Gamma | Sep 12, 2001 | Sep 19, 2001 | Oct 3, 2001 |
| № 9607 | S17 | E03 | 25 | 0260 | Beta-Gamma | Sep 11, 2001 | Sep 18, 2001 | Oct 2, 2001 |
| № 9606 | S18 | W22 | 33 | 0210 | Beta | Sep 9, 2001 | Sep 16, 2001 | Sep 30, 2001 |
| № 9605 | S19 | W30 | 05 | 0050 | Beta | Sep 9, 2001 | Sep 16, 2001 | Sep 29, 2001 |
| № 9601 | N13 | W93 | 01 | 0210 | Alpha | Sep 4, 2001 | Sep 11, 2001 | Sep 24, 2001 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1972, January to 2001, September. Gray background - average solar cycle.
