Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 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) | |
|---|---|---|---|---|---|---|---|---|
| № 552 | S07 | E08 | 07 | 0050 | Beta | Feb 5, 2004 | Feb 12, 2004 | Feb 26, 2004 |
| № 551 | S05 | E53 | 03 | 0050 | Beta | Feb 9, 2004 | Feb 16, 2004 | Feb 29, 2004 |
| № 550 | S09 | W24 | 02 | 0030 | Beta | Feb 3, 2004 | Feb 10, 2004 | Feb 23, 2004 |
| № 549 | N14 | E32 | 18 | 0220 | Beta | Feb 7, 2004 | Feb 14, 2004 | Feb 28, 2004 |
| № 547 | S09 | W38 | 12 | 0150 | Beta-Gamma | Feb 2, 2004 | Feb 9, 2004 | Feb 22, 2004 |
| № 546 | S12 | E04 | 01 | 0020 | Alpha | Feb 5, 2004 | Feb 12, 2004 | Feb 26, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to February 2004. The gray background is the average SSN index.
