Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 12, 2002. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9907 | S04 | E76 | 10 | 0200 | Beta | Apr 19, 2002 | Apr 25, 2002 | May 9, 2002 |
| № 9906 | S16 | E42 | 09 | 0080 | Beta | Apr 16, 2002 | Apr 23, 2002 | May 7, 2002 |
| № 9905 | S15 | W11 | 07 | 0040 | Beta | Apr 12, 2002 | Apr 19, 2002 | May 3, 2002 |
| № 9904 | S16 | W34 | 04 | 0020 | Beta | Apr 10, 2002 | Apr 17, 2002 | May 1, 2002 |
| № 9903 | N19 | E36 | 05 | 0040 | Beta | Apr 16, 2002 | Apr 22, 2002 | May 6, 2002 |
| № 9902 | N13 | E33 | 05 | 0080 | Beta | Apr 15, 2002 | Apr 22, 2002 | May 6, 2002 |
| № 9901 | N21 | W12 | 16 | 0190 | Beta-Gamma-Delta | Apr 12, 2002 | Apr 19, 2002 | May 3, 2002 |
| № 9900 | S28 | W43 | 13 | 0100 | Beta | Apr 9, 2002 | Apr 17, 2002 | May 1, 2002 |
| № 9899 | N18 | E11 | 06 | 0210 | Beta | Apr 14, 2002 | Apr 21, 2002 | May 4, 2002 |
| № 9898 | S18 | W00 | 01 | 0010 | Alpha | Apr 13, 2002 | Apr 20, 2002 | May 3, 2002 |
| № 9897 | S02 | W72 | 01 | 0010 | Alpha | Apr 7, 2002 | Apr 14, 2002 | Apr 28, 2002 |
| № 9896 | S11 | W05 | 01 | 0110 | Alpha | Apr 12, 2002 | Apr 19, 2002 | May 3, 2002 |
| № 9893 | N19 | W25 | 27 | 0340 | Beta-Gamma | Apr 11, 2002 | Apr 18, 2002 | May 2, 2002 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1973 to April 2002. The gray background is the average SSN index.
