Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 37 | N15 | E21 | 02 | 0170 | Alpha | Jul 24, 2002 | Jul 30, 2002 | Aug 13, 2002 |
| № 36 | S07 | E11 | 47 | 0980 | Beta-Gamma-Delta | Jul 23, 2002 | Jul 30, 2002 | Aug 12, 2002 |
| № 35 | S08 | W06 | 17 | 0040 | Beta | Jul 22, 2002 | Jul 28, 2002 | Aug 11, 2002 |
| № 30 | N18 | W63 | 30 | 0460 | Beta-Gamma-Delta | Jul 17, 2002 | Jul 24, 2002 | Aug 7, 2002 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1973 to July 2002. The gray background is the average SSN index.
