Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 9, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 332 | N11 | E45 | 02 | 0020 | Alpha | Apr 13, 2003 | Apr 20, 2003 | May 4, 2003 |
| № 331 | S08 | W48 | 01 | 0020 | Alpha | Apr 6, 2003 | Apr 13, 2003 | Apr 27, 2003 |
| № 330 | N07 | E10 | 07 | 0390 | Beta-Gamma | Apr 11, 2003 | Apr 18, 2003 | May 1, 2003 |
| № 325 | N14 | W77 | 02 | 0270 | Alpha | Apr 4, 2003 | Apr 11, 2003 | Apr 25, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to April 2003. The gray background is the average SSN index.
