Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 349 | S14 | E46 | 15 | 0150 | Beta | May 2, 2003 | May 9, 2003 | May 23, 2003 |
| № 348 | S36 | E44 | 07 | 0030 | Beta | May 3, 2003 | May 10, 2003 | May 24, 2003 |
| № 347 | S20 | E22 | 03 | 0020 | Beta | May 1, 2003 | May 8, 2003 | May 21, 2003 |
| № 346 | N16 | E35 | 01 | 0060 | Alpha | May 2, 2003 | May 9, 2003 | May 22, 2003 |
| № 345 | S17 | E34 | 06 | 0190 | Beta | May 2, 2003 | May 8, 2003 | May 22, 2003 |
| № 344 | N16 | W00 | 20 | 0450 | Beta-Gamma-Delta | Apr 29, 2003 | May 6, 2003 | May 20, 2003 |
| № 343 | N06 | E05 | 05 | 0010 | Beta | Apr 29, 2003 | May 6, 2003 | May 20, 2003 |
| № 342 | N17 | W75 | 01 | 0030 | Alpha | Apr 23, 2003 | Apr 30, 2003 | May 14, 2003 |
| № 338 | N18 | W85 | 07 | 0200 | Beta-Gamma | Apr 23, 2003 | Apr 29, 2003 | May 13, 2003 |
| № 337 | S14 | W40 | 21 | 0220 | Beta-Gamma-Delta | Apr 26, 2003 | May 3, 2003 | May 16, 2003 |
| № 336 | N14 | W56 | 04 | 0010 | Beta | Apr 25, 2003 | May 2, 2003 | May 15, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to April 2003. The gray background is the average SSN index.
