No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 339 | N18 | W43 | 06 | 0020 | Beta-Gamma | Apr 19, 2003 | Apr 25, 2003 | May 9, 2003 |
| № 338 | N18 | E11 | 08 | 0040 | Beta | Apr 23, 2003 | Apr 30, 2003 | May 13, 2003 |
| № 337 | S14 | E57 | 10 | 0340 | Beta | Apr 26, 2003 | May 3, 2003 | May 17, 2003 |
| № 336 | N13 | E39 | 02 | 0150 | Alpha | Apr 25, 2003 | May 2, 2003 | May 15, 2003 |
| № 335 | S23 | W31 | 06 | 0020 | Beta | Apr 19, 2003 | Apr 26, 2003 | May 10, 2003 |
| № 334 | S07 | W63 | 01 | 0030 | 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.
