Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9606 | S17 | E59 | 02 | 0040 | Beta | Sep 9, 2001 | Sep 16, 2001 | Sep 30, 2001 |
| № 9605 | S20 | E55 | 03 | 0020 | Beta | Sep 9, 2001 | Sep 16, 2001 | Sep 30, 2001 |
| № 9604 | S21 | W59 | 04 | 0040 | Beta | Aug 31, 2001 | Sep 7, 2001 | Sep 21, 2001 |
| № 9603 | S09 | E51 | 02 | 0020 | Alpha | Sep 9, 2001 | Sep 15, 2001 | Sep 29, 2001 |
| № 9602 | S07 | E04 | 03 | 0010 | Beta | Sep 5, 2001 | Sep 12, 2001 | Sep 25, 2001 |
| № 9601 | N14 | W04 | 55 | 0680 | Beta-Gamma | Sep 5, 2001 | Sep 11, 2001 | Sep 25, 2001 |
| № 9599 | S18 | W29 | 02 | 0060 | Beta | Sep 3, 2001 | Sep 9, 2001 | Sep 23, 2001 |
| № 9596 | N22 | W36 | 01 | 0180 | Alpha | Sep 2, 2001 | Sep 9, 2001 | Sep 23, 2001 |
| № 9591 | S18 | W79 | 06 | 0260 | Beta-Gamma-Delta | Aug 30, 2001 | Sep 6, 2001 | Sep 19, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to September 2001. The gray background is the average SSN index.
