Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 16, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9669 | N13 | E70 | 04 | 0070 | Beta | Oct 22, 2001 | Oct 29, 2001 | Nov 12, 2001 |
| № 9668 | N29 | E01 | 04 | 0010 | Beta | Oct 17, 2001 | Oct 24, 2001 | Nov 7, 2001 |
| № 9667 | N23 | E60 | 04 | 0060 | Beta | Oct 22, 2001 | Oct 29, 2001 | Nov 11, 2001 |
| № 9666 | S11 | E18 | 01 | 0000 | Alpha | Oct 18, 2001 | Oct 25, 2001 | Nov 8, 2001 |
| № 9663 | S15 | E09 | 01 | 0020 | Alpha | Oct 18, 2001 | Oct 25, 2001 | Nov 7, 2001 |
| № 9662 | N09 | W12 | 08 | 0060 | Beta | Oct 16, 2001 | Oct 23, 2001 | Nov 5, 2001 |
| № 9661 | N15 | E17 | 16 | 0720 | Beta-Delta | Oct 18, 2001 | Oct 25, 2001 | Nov 8, 2001 |
| № 9660 | N12 | W50 | 01 | 0020 | Alpha | Oct 13, 2001 | Oct 20, 2001 | Nov 3, 2001 |
| № 9659 | N04 | W51 | 04 | 0040 | Beta | Oct 13, 2001 | Oct 20, 2001 | Nov 2, 2001 |
| № 9658 | S15 | W09 | 21 | 0160 | Beta | Oct 16, 2001 | Oct 23, 2001 | Nov 6, 2001 |
| № 9653 | S22 | W64 | 02 | 0020 | Beta | Oct 12, 2001 | Oct 19, 2001 | Nov 2, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to October 2001. The gray background is the average SSN index.
