Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 567 | S13 | E50 | 05 | 0040 | Beta | Mar 4, 2004 | Mar 11, 2004 | Mar 24, 2004 |
| № 565 | S04 | W21 | 15 | 0190 | Beta | Feb 27, 2004 | Mar 5, 2004 | Mar 19, 2004 |
| № 564 | N14 | W42 | 29 | 0870 | Beta-Gamma | Feb 26, 2004 | Mar 4, 2004 | Mar 17, 2004 |
| № 563 | S23 | W27 | 01 | 0010 | Alpha | Feb 27, 2004 | Mar 5, 2004 | Mar 19, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to February 2004. The gray background is the average SSN index.
