Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 690 | N00 | E79 | 01 | 0060 | Alpha | Oct 30, 2004 | Nov 6, 2004 | Nov 19, 2004 |
| № 689 | N12 | E62 | 01 | 0060 | Alpha | Oct 29, 2004 | Nov 4, 2004 | Nov 18, 2004 |
| № 688 | S08 | W73 | 01 | 0060 | Alpha | Oct 18, 2004 | Oct 25, 2004 | Nov 8, 2004 |
| № 687 | N10 | E40 | 16 | 0280 | Beta-Gamma | Oct 27, 2004 | Nov 3, 2004 | Nov 16, 2004 |
| № 685 | S06 | W27 | 09 | 0050 | Beta | Oct 22, 2004 | Oct 29, 2004 | Nov 11, 2004 |
| № 684 | S05 | E02 | 12 | 0200 | Beta | Oct 24, 2004 | Oct 31, 2004 | Nov 13, 2004 |
| № 683 | S11 | W43 | 04 | 0020 | Beta | Oct 21, 2004 | Oct 27, 2004 | Nov 10, 2004 |
| № 682 | S13 | W58 | 10 | 0150 | Beta-Gamma | Oct 20, 2004 | Oct 26, 2004 | Nov 9, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to October 2004. The gray background is the average SSN index.
