Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 17, 2003. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 435 | S18 | W41 | 01 | 0010 | Alpha | Aug 15, 2003 | Aug 22, 2003 | Sep 4, 2003 |
| № 434 | S23 | W10 | 04 | 0020 | Beta | Aug 17, 2003 | Aug 24, 2003 | Sep 7, 2003 |
| № 433 | S20 | W04 | 01 | 0020 | Alpha | Aug 18, 2003 | Aug 25, 2003 | Sep 7, 2003 |
| № 432 | S04 | E29 | 01 | 0020 | Alpha | Aug 20, 2003 | Aug 27, 2003 | Sep 9, 2003 |
| № 431 | S12 | W26 | 35 | 0400 | Beta-Gamma-Delta | Aug 16, 2003 | Aug 23, 2003 | Sep 5, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to August 2003. The gray background is the average SSN index.
