Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9546 | S17 | E44 | 06 | 0070 | Beta | Jul 23, 2001 | Jul 29, 2001 | Aug 12, 2001 |
| № 9545 | N09 | E06 | 07 | 0050 | Beta-Gamma | Jul 20, 2001 | Jul 26, 2001 | Aug 9, 2001 |
| № 9544 | N16 | W28 | 08 | 0010 | Beta | Jul 17, 2001 | Jul 24, 2001 | Aug 7, 2001 |
| № 9543 | S23 | E46 | 13 | 0250 | Beta | Jul 23, 2001 | Jul 30, 2001 | Aug 13, 2001 |
| № 9542 | N08 | E38 | 04 | 0020 | Beta | Jul 22, 2001 | Jul 29, 2001 | Aug 11, 2001 |
| № 9541 | N17 | E14 | 06 | 0130 | Beta | Jul 20, 2001 | Jul 27, 2001 | Aug 10, 2001 |
| № 9539 | S18 | W45 | 20 | 0220 | Beta-Gamma | Jul 16, 2001 | Jul 23, 2001 | Aug 5, 2001 |
| № 9538 | N16 | E01 | 01 | 0180 | Alpha | Jul 19, 2001 | Jul 26, 2001 | Aug 9, 2001 |
| № 9537 | S07 | W44 | 10 | 0070 | Beta | Jul 16, 2001 | Jul 23, 2001 | Aug 5, 2001 |
| № 9535 | N06 | W20 | 01 | 0120 | Alpha | Jul 18, 2001 | Jul 24, 2001 | Aug 7, 2001 |
| № 9533 | S09 | W83 | 05 | 0030 | Beta | Jul 13, 2001 | Jul 20, 2001 | Aug 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to July 2001. The gray background is the average SSN index.
