Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9582 | N32 | E70 | 03 | 0040 | Beta | Aug 23, 2001 | Aug 30, 2001 | Sep 13, 2001 |
| № 9581 | S28 | W12 | 01 | 0020 | Alpha | Aug 16, 2001 | Aug 23, 2001 | Sep 6, 2001 |
| № 9580 | N25 | E58 | 01 | 0140 | Alpha | Aug 22, 2001 | Aug 29, 2001 | Sep 12, 2001 |
| № 9579 | S19 | W25 | 08 | 0050 | Beta | Aug 15, 2001 | Aug 22, 2001 | Sep 5, 2001 |
| № 9578 | S08 | W56 | 04 | 0020 | Beta | Aug 13, 2001 | Aug 20, 2001 | Sep 2, 2001 |
| № 9577 | N13 | W64 | 07 | 0050 | Beta | Aug 12, 2001 | Aug 19, 2001 | Sep 2, 2001 |
| № 9575 | N12 | E17 | 01 | 0130 | Alpha | Aug 19, 2001 | Aug 25, 2001 | Sep 8, 2001 |
| № 9574 | S04 | W69 | 13 | 0190 | Beta | Aug 12, 2001 | Aug 19, 2001 | Sep 1, 2001 |
| № 9573 | S08 | W26 | 05 | 0040 | Beta | Aug 15, 2001 | Aug 22, 2001 | Sep 5, 2001 |
| № 9571 | N06 | W46 | 01 | 0020 | Alpha | Aug 14, 2001 | Aug 21, 2001 | Sep 3, 2001 |
| № 9570 | S12 | W63 | 01 | 0140 | Alpha | Aug 12, 2001 | Aug 19, 2001 | Sep 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to August 2001. The gray background is the average SSN index.
