Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 28, 2006. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 877 | S07 | E42 | 01 | 0010 | Alpha | May 2, 2006 | May 9, 2006 | May 22, 2006 |
| № 876 | S16 | E56 | 11 | 0230 | Beta-Gamma | May 3, 2006 | May 10, 2006 | May 24, 2006 |
| № 875 | S11 | E22 | 21 | 0310 | Beta-Gamma | May 1, 2006 | May 7, 2006 | May 21, 2006 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1977 to April 2006. The gray background is the average SSN index.
