Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 335 | S22 | E28 | 02 | 0030 | Beta | Apr 19, 2003 | Apr 26, 2003 | May 10, 2003 |
| № 334 | S08 | E02 | 07 | 0060 | Beta | Apr 17, 2003 | Apr 24, 2003 | May 7, 2003 |
| № 332 | N12 | W47 | 04 | 0030 | Beta | Apr 13, 2003 | Apr 20, 2003 | May 4, 2003 |
| № 330 | N09 | W86 | 01 | 0200 | Alpha | Apr 11, 2003 | Apr 17, 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.
