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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 598 | S07 | W41 | 04 | 0020 | Beta | Apr 21, 2004 | Apr 27, 2004 | May 11, 2004 |
| № 597 | S07 | W80 | 03 | 0050 | Beta | Apr 18, 2004 | Apr 24, 2004 | May 8, 2004 |
| № 596 | S08 | E08 | 24 | 0400 | Beta-Gamma | Apr 24, 2004 | May 1, 2004 | May 15, 2004 |
| № 595 | S07 | W10 | 06 | 0030 | Beta | Apr 23, 2004 | Apr 30, 2004 | May 13, 2004 |
| № 593 | S19 | W60 | 03 | 0020 | Beta | Apr 19, 2004 | Apr 26, 2004 | May 10, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to April 2004. The gray background is the average SSN index.
