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) | |
|---|---|---|---|---|---|---|---|---|
| № 587 | S12 | E64 | 18 | 0080 | Beta | Apr 5, 2004 | Apr 12, 2004 | Apr 25, 2004 |
| № 585 | S14 | E26 | 19 | 0050 | Beta | Apr 2, 2004 | Apr 9, 2004 | Apr 22, 2004 |
| № 584 | S13 | W02 | 03 | 0010 | Beta | Mar 31, 2004 | Apr 7, 2004 | Apr 20, 2004 |
| № 582 | N14 | E19 | 54 | 0420 | Beta-Gamma | Apr 1, 2004 | Apr 8, 2004 | Apr 22, 2004 |
| № 581 | S04 | E12 | 01 | 0160 | Alpha | Apr 1, 2004 | Apr 8, 2004 | Apr 21, 2004 |
| № 578 | N13 | W68 | 03 | 0010 | Beta | Mar 26, 2004 | Apr 2, 2004 | Apr 15, 2004 |
| № 577 | S03 | W80 | 01 | 0020 | Alpha | Mar 25, 2004 | Apr 1, 2004 | Apr 14, 2004 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1975, January to 2004, March. Gray background - average solar cycle.
