Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 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) | |
|---|---|---|---|---|---|---|---|---|
| № 654 | N07 | E27 | 08 | 0130 | Beta | Jul 31, 2004 | Aug 7, 2004 | Aug 20, 2004 |
| № 653 | S14 | W63 | 03 | 0070 | Beta | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
| № 652 | N07 | W60 | 25 | 0930 | Beta-Gamma | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to July 2004. The gray background is the average SSN index.
