Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 4, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9893 | N18 | E74 | 01 | 0030 | Alpha | Apr 11, 2002 | Apr 18, 2002 | May 2, 2002 |
| № 9892 | N04 | E45 | 04 | 0040 | Beta | Apr 9, 2002 | Apr 15, 2002 | Apr 29, 2002 |
| № 9891 | S08 | W26 | 03 | 0010 | Beta | Apr 3, 2002 | Apr 10, 2002 | Apr 24, 2002 |
| № 9889 | S19 | E01 | 02 | 0000 | Beta | Apr 5, 2002 | Apr 12, 2002 | Apr 26, 2002 |
| № 9888 | S13 | E03 | 13 | 0250 | Beta | Apr 6, 2002 | Apr 12, 2002 | Apr 26, 2002 |
| № 9887 | N02 | W06 | 22 | 0710 | Beta-Gamma | Apr 5, 2002 | Apr 12, 2002 | Apr 25, 2002 |
| № 9886 | N12 | W14 | 09 | 0110 | Beta | Apr 4, 2002 | Apr 11, 2002 | Apr 25, 2002 |
| № 9885 | N13 | W30 | 17 | 0500 | Beta-Gamma | Apr 3, 2002 | Apr 10, 2002 | Apr 23, 2002 |
| № 9884 | S17 | W57 | 01 | 0040 | Alpha | Apr 1, 2002 | Apr 8, 2002 | Apr 22, 2002 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1973 to April 2002. The gray background is the average SSN index.
