Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 678 | N12 | W29 | 02 | 0020 | Beta | Oct 3, 2004 | Oct 10, 2004 | Oct 23, 2004 |
| № 676 | S12 | E11 | 05 | 0040 | Beta | Oct 6, 2004 | Oct 13, 2004 | Oct 26, 2004 |
| № 675 | S09 | W33 | 02 | 0070 | Alpha | Oct 3, 2004 | Oct 9, 2004 | Oct 23, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to October 2004. The gray background is the average SSN index.
