Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 452 | S07 | W71 | 02 | 0020 | Alpha | Aug 31, 2003 | Sep 6, 2003 | Sep 20, 2003 |
| № 450 | S16 | W07 | 13 | 0120 | Beta | Sep 4, 2003 | Sep 11, 2003 | Sep 25, 2003 |
| № 448 | N19 | W48 | 03 | 0020 | Beta | Sep 1, 2003 | Sep 8, 2003 | Sep 22, 2003 |
| № 442 | S12 | W86 | 01 | 0110 | Alpha | Aug 30, 2003 | Sep 5, 2003 | Sep 19, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to September 2003. The gray background is the average SSN index.
