Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 31, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 547 | S09 | E14 | 04 | 0030 | Beta | Feb 2, 2004 | Feb 9, 2004 | Feb 22, 2004 |
| № 546 | S11 | E55 | 03 | 0050 | Beta | Feb 5, 2004 | Feb 12, 2004 | Feb 26, 2004 |
| № 545 | S20 | W32 | 05 | 0040 | Beta | Jan 30, 2004 | Feb 5, 2004 | Feb 19, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to January 2004. The gray background is the average SSN index.
