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) | |
|---|---|---|---|---|---|---|---|---|
| № 596 | S09 | E45 | 21 | 0290 | Beta | Apr 24, 2004 | May 1, 2004 | May 15, 2004 |
| № 595 | S07 | E28 | 25 | 0080 | Beta | Apr 23, 2004 | Apr 30, 2004 | May 13, 2004 |
| № 594 | N15 | E01 | 01 | 0010 | Alpha | Apr 21, 2004 | Apr 28, 2004 | May 11, 2004 |
| № 593 | S18 | W23 | 10 | 0050 | Beta | Apr 19, 2004 | Apr 26, 2004 | May 10, 2004 |
| № 592 | S10 | W20 | 01 | 0010 | Alpha | 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.
