Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 652 | N05 | E85 | 02 | 0300 | Alpha | Jul 24, 2004 | Jul 31, 2004 | Aug 14, 2004 |
| № 651 | S16 | E15 | 11 | 0010 | Beta | Jul 19, 2004 | Jul 26, 2004 | Aug 9, 2004 |
| № 650 | S08 | E09 | 10 | 0010 | Beta | Jul 19, 2004 | Jul 25, 2004 | Aug 8, 2004 |
| № 649 | S10 | E27 | 48 | 0530 | Beta-Gamma-Delta | Jul 20, 2004 | Jul 27, 2004 | Aug 9, 2004 |
| № 644 | N13 | W06 | 05 | 0160 | Alpha | Jul 17, 2004 | Jul 24, 2004 | Aug 7, 2004 |
| № 642 | S07 | W55 | 06 | 0070 | Beta | 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.
