Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on August 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 437 | S22 | W43 | 01 | 0010 | Alpha | Aug 19, 2003 | Aug 26, 2003 | Sep 9, 2003 |
| № 436 | N07 | E25 | 15 | 0120 | Beta | Aug 24, 2003 | Aug 31, 2003 | Sep 14, 2003 |
| № 433 | S20 | W62 | 01 | 0000 | Alpha | Aug 18, 2003 | Aug 24, 2003 | Sep 7, 2003 |
| № 431 | S10 | W88 | 05 | 0100 | Beta | Aug 16, 2003 | Aug 22, 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.
