Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 17, 2004. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 682 | S14 | E24 | 21 | 0210 | Beta | Oct 20, 2004 | Oct 27, 2004 | Nov 9, 2004 |
| № 681 | N10 | W62 | 02 | 0010 | Alpha | Oct 13, 2004 | Oct 20, 2004 | Nov 3, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to October 2004. The gray background is the average SSN index.
