Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 18, 2001. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9462 | N18 | E70 | 01 | 0100 | Alpha | May 25, 2001 | May 31, 2001 | Jun 14, 2001 |
| № 9461 | N18 | E46 | 08 | 0110 | Beta | May 23, 2001 | May 30, 2001 | Jun 12, 2001 |
| № 9458 | S11 | W87 | 01 | 0050 | Alpha | May 13, 2001 | May 19, 2001 | Jun 2, 2001 |
| № 9456 | N07 | W76 | 05 | 0070 | Beta | May 14, 2001 | May 20, 2001 | Jun 3, 2001 |
| № 9455 | S16 | W69 | 26 | 0230 | Beta-Gamma | May 14, 2001 | May 21, 2001 | Jun 4, 2001 |
| № 9454 | N14 | W25 | 25 | 0140 | Beta-Gamma | May 17, 2001 | May 24, 2001 | Jun 7, 2001 |
| № 9451 | S20 | W96 | 01 | 0060 | Alpha | May 12, 2001 | May 19, 2001 | Jun 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to May 2001. The gray background is the average SSN index.
