Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 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) | |
|---|---|---|---|---|---|---|---|---|
| № 636 | S10 | E33 | 07 | 0050 | Beta | Jun 24, 2004 | Jul 1, 2004 | Jul 15, 2004 |
| № 635 | S12 | E02 | 79 | 0600 | Beta-Gamma-Delta | Jun 22, 2004 | Jun 29, 2004 | Jul 12, 2004 |
| № 634 | N12 | W15 | 15 | 0370 | Beta-Gamma-Delta | Jun 21, 2004 | Jun 27, 2004 | Jul 11, 2004 |
| № 632 | S12 | W62 | 01 | 0060 | Alpha | Jun 17, 2004 | Jun 24, 2004 | Jul 7, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to June 2004. The gray background is the average SSN index.
