Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9559 | S25 | E10 | 05 | 0010 | Beta | Jul 30, 2001 | Aug 6, 2001 | Aug 20, 2001 |
| № 9557 | S18 | E54 | 01 | 0070 | Alpha | Aug 2, 2001 | Aug 9, 2001 | Aug 23, 2001 |
| № 9553 | N12 | W22 | 21 | 0110 | Beta | Jul 28, 2001 | Aug 3, 2001 | Aug 17, 2001 |
| № 9550 | N09 | W82 | 01 | 0010 | Alpha | Jul 23, 2001 | Jul 30, 2001 | Aug 12, 2001 |
| № 9548 | N16 | W75 | 01 | 0070 | Alpha | Jul 24, 2001 | Jul 30, 2001 | Aug 13, 2001 |
| № 9543 | S25 | W86 | 07 | 0190 | Beta-Gamma | Jul 23, 2001 | Jul 30, 2001 | Aug 13, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to July 2001. The gray background is the average SSN index.
