Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9548 | N17 | W07 | 12 | 0110 | Beta | Jul 24, 2001 | Jul 31, 2001 | Aug 13, 2001 |
| № 9546 | S15 | W31 | 11 | 0090 | Beta | Jul 22, 2001 | Jul 29, 2001 | Aug 11, 2001 |
| № 9545 | N09 | W60 | 16 | 0070 | Beta | Jul 20, 2001 | Jul 26, 2001 | Aug 9, 2001 |
| № 9543 | S22 | W22 | 41 | 0380 | Beta-Gamma | Jul 23, 2001 | Jul 29, 2001 | Aug 12, 2001 |
| № 9541 | N19 | W54 | 01 | 0020 | Alpha | Jul 20, 2001 | Jul 27, 2001 | Aug 10, 2001 |
| № 9538 | N16 | W67 | 01 | 0150 | Alpha | Jul 19, 2001 | Jul 26, 2001 | Aug 9, 2001 |
| № 9535 | N06 | W88 | 01 | 0090 | Alpha | Jul 18, 2001 | Jul 24, 2001 | Aug 7, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to July 2001. The gray background is the average SSN index.
