Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 18, 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 | E71 | 10 | 0100 | Beta | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
| № 652 | N05 | E71 | 28 | 0750 | Beta | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
| № 651 | S16 | E01 | 05 | 0010 | Beta | Jul 19, 2004 | Jul 26, 2004 | Aug 9, 2004 |
| № 649 | S10 | E13 | 47 | 0500 | Beta-Gamma-Delta | Jul 20, 2004 | Jul 27, 2004 | Aug 9, 2004 |
| № 644 | N13 | W20 | 08 | 0150 | Beta | Jul 17, 2004 | Jul 24, 2004 | Aug 7, 2004 |
| № 642 | S07 | W69 | 07 | 0060 | Alpha | Jul 14, 2004 | Jul 21, 2004 | Aug 3, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to July 2004. The gray background is the average SSN index.
