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) | |
|---|---|---|---|---|---|---|---|---|
| № 598 | S05 | W29 | 06 | 0020 | Beta | Apr 21, 2004 | Apr 28, 2004 | May 11, 2004 |
| № 597 | S06 | W71 | 04 | 0050 | Beta | Apr 18, 2004 | Apr 24, 2004 | May 8, 2004 |
| № 596 | S07 | E20 | 22 | 0340 | Beta-Gamma | Apr 24, 2004 | May 1, 2004 | May 15, 2004 |
| № 595 | S06 | E01 | 11 | 0050 | Beta | Apr 23, 2004 | Apr 30, 2004 | May 13, 2004 |
| № 593 | S18 | W50 | 05 | 0030 | Beta | Apr 19, 2004 | Apr 26, 2004 | May 10, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, April. Gray background - average solar cycle.
