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) | |
|---|---|---|---|---|---|---|---|---|
| № 597 | S08 | W90 | 04 | 0090 | Beta | Apr 18, 2004 | Apr 25, 2004 | May 8, 2004 |
| № 596 | S08 | W08 | 20 | 0320 | Beta-Gamma | Apr 24, 2004 | May 1, 2004 | May 15, 2004 |
| № 595 | S07 | W25 | 09 | 0040 | Beta | Apr 23, 2004 | Apr 30, 2004 | May 13, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, April. Gray background - average solar cycle.
