Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 653 | S14 | E33 | 17 | 0190 | Beta | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
| № 652 | N10 | E33 | 43 | 1670 | Beta-Gamma-Delta | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
| № 651 | S16 | W36 | 03 | 0000 | Beta | Jul 19, 2004 | Jul 26, 2004 | Aug 9, 2004 |
| № 649 | S10 | W26 | 33 | 0230 | Beta-Gamma-Delta | Jul 20, 2004 | Jul 27, 2004 | Aug 9, 2004 |
| № 644 | N13 | W60 | 01 | 0100 | Alpha | Jul 17, 2004 | Jul 24, 2004 | Aug 7, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to July 2004. The gray background is the average SSN index.
