Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 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) | |
|---|---|---|---|---|---|---|---|---|
| № 480 | N20 | W44 | 03 | 0040 | Beta | Oct 15, 2003 | Oct 22, 2003 | Nov 5, 2003 |
| № 477 | S14 | W67 | 05 | 0050 | Beta | Oct 13, 2003 | Oct 20, 2003 | Nov 3, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to October 2003. The gray background is the average SSN index.
