Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 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) | |
|---|---|---|---|---|---|---|---|---|
| № 462 | S09 | W28 | 08 | 0030 | Beta | Sep 16, 2003 | Sep 23, 2003 | Oct 6, 2003 |
| № 461 | N12 | W36 | 07 | 0030 | Beta | Sep 15, 2003 | Sep 22, 2003 | Oct 6, 2003 |
| № 460 | N17 | E64 | 04 | 0050 | Beta | Sep 23, 2003 | Sep 30, 2003 | Oct 13, 2003 |
| № 459 | S11 | E14 | 08 | 0030 | Beta | Sep 19, 2003 | Sep 26, 2003 | Oct 9, 2003 |
| № 458 | S10 | W71 | 01 | 0020 | Alpha | Sep 12, 2003 | Sep 19, 2003 | Oct 3, 2003 |
| № 457 | S12 | W81 | 01 | 0000 | Alpha | Sep 12, 2003 | Sep 19, 2003 | Oct 2, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to September 2003. The gray background is the average SSN index.
