Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 549 | N13 | E70 | 03 | 0090 | Beta | Feb 7, 2004 | Feb 14, 2004 | Feb 28, 2004 |
| № 548 | N06 | E30 | 01 | 0010 | Alpha | Feb 4, 2004 | Feb 11, 2004 | Feb 25, 2004 |
| № 547 | S10 | E01 | 04 | 0020 | Beta | Feb 2, 2004 | Feb 9, 2004 | Feb 22, 2004 |
| № 546 | S12 | E41 | 01 | 0040 | Alpha | Feb 5, 2004 | Feb 12, 2004 | Feb 26, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, February. Gray background - average solar cycle.
