Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 23, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 342 | N18 | W11 | 06 | 0020 | Alpha | Apr 23, 2003 | Apr 30, 2003 | May 14, 2003 |
| № 341 | S10 | E57 | 04 | 0020 | Beta | Apr 29, 2003 | May 5, 2003 | May 19, 2003 |
| № 340 | S06 | E39 | 02 | 0010 | Alpha | Apr 27, 2003 | May 4, 2003 | May 18, 2003 |
| № 339 | N16 | W75 | 08 | 0060 | Beta | Apr 19, 2003 | Apr 25, 2003 | May 9, 2003 |
| № 338 | N18 | W24 | 20 | 0100 | Beta-Gamma | Apr 22, 2003 | Apr 29, 2003 | May 13, 2003 |
| № 337 | S14 | E25 | 19 | 0270 | Beta-Gamma | Apr 26, 2003 | May 3, 2003 | May 17, 2003 |
| № 336 | N14 | E06 | 05 | 0070 | Beta | Apr 25, 2003 | May 2, 2003 | May 15, 2003 |
| № 334 | S07 | W96 | 03 | 0020 | Alpha | Apr 17, 2003 | Apr 24, 2003 | May 7, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to April 2003. The gray background is the average SSN index.
