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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 28, 2004. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 586 | S18 | W84 | 02 | 0010 | Beta | Mar 23, 2004 | Mar 30, 2004 | Apr 12, 2004 |
| № 585 | S15 | E46 | 05 | 0050 | Beta | Apr 2, 2004 | Apr 9, 2004 | Apr 22, 2004 |
| № 584 | S13 | E17 | 06 | 0030 | Beta | Mar 31, 2004 | Apr 6, 2004 | Apr 20, 2004 |
| № 583 | N07 | W70 | 02 | 0010 | Beta | Mar 24, 2004 | Mar 31, 2004 | Apr 13, 2004 |
| № 582 | N14 | E41 | 12 | 0380 | Beta | Apr 1, 2004 | Apr 8, 2004 | Apr 22, 2004 |
| № 581 | S04 | E35 | 01 | 0120 | Alpha | Apr 1, 2004 | Apr 8, 2004 | Apr 21, 2004 |
| № 578 | N15 | W51 | 09 | 0060 | Beta | Mar 25, 2004 | Apr 1, 2004 | Apr 15, 2004 |
| № 577 | S02 | W58 | 01 | 0020 | Alpha | Mar 25, 2004 | Apr 1, 2004 | Apr 14, 2004 |
| № 574 | S05 | W87 | 01 | 0010 | Alpha | Mar 23, 2004 | Mar 30, 2004 | Apr 12, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to March 2004. The gray background is the average SSN index.
