Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 13, 2003. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 334 | S08 | E43 | 06 | 0110 | Beta | Apr 17, 2003 | Apr 24, 2003 | May 8, 2003 |
| № 332 | N12 | W07 | 06 | 0010 | Beta | Apr 13, 2003 | Apr 20, 2003 | May 4, 2003 |
| № 330 | N07 | W43 | 18 | 0340 | Beta | Apr 11, 2003 | Apr 18, 2003 | May 1, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to April 2003. The gray background is the average SSN index.
