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) | |
|---|---|---|---|---|---|---|---|---|
| № 555 | S14 | E72 | 01 | 0020 | Alpha | Feb 16, 2004 | Feb 23, 2004 | Mar 8, 2004 |
| № 554 | S08 | E52 | 08 | 0310 | Beta-Gamma-Delta | Feb 15, 2004 | Feb 22, 2004 | Mar 6, 2004 |
| № 551 | S06 | W27 | 23 | 0330 | Beta-Gamma | Feb 9, 2004 | Feb 16, 2004 | Feb 29, 2004 |
| № 549 | N13 | W49 | 09 | 0060 | Beta | Feb 7, 2004 | Feb 14, 2004 | Feb 28, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, February. Gray background - average solar cycle.
