Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 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) | |
|---|---|---|---|---|---|---|---|---|
| № 618 | S10 | W27 | 40 | 0330 | Beta-Gamma-Delta | May 27, 2004 | Jun 3, 2004 | Jun 16, 2004 |
| № 615 | N17 | W80 | 02 | 0070 | Alpha | May 23, 2004 | May 30, 2004 | Jun 12, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to May 2004. The gray background is the average SSN index.
