Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 21, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9676 | N13 | E68 | 01 | 0070 | Beta | Oct 27, 2001 | Nov 3, 2001 | Nov 17, 2001 |
| № 9675 | S14 | E67 | 01 | 0030 | Alpha | Oct 27, 2001 | Nov 3, 2001 | Nov 17, 2001 |
| № 9674 | S08 | E18 | 07 | 0050 | Beta | Oct 24, 2001 | Oct 30, 2001 | Nov 13, 2001 |
| № 9673 | N03 | E44 | 04 | 0070 | Beta | Oct 25, 2001 | Nov 1, 2001 | Nov 15, 2001 |
| № 9672 | S20 | E38 | 08 | 0150 | Beta | Oct 25, 2001 | Nov 1, 2001 | Nov 15, 2001 |
| № 9671 | N15 | W11 | 15 | 0080 | Beta | Oct 21, 2001 | Oct 28, 2001 | Nov 11, 2001 |
| № 9670 | S19 | E17 | 17 | 0470 | Beta | Oct 23, 2001 | Oct 30, 2001 | Nov 13, 2001 |
| № 9669 | N14 | W01 | 32 | 0150 | Beta | Oct 22, 2001 | Oct 29, 2001 | Nov 12, 2001 |
| № 9667 | N26 | W12 | 01 | 0010 | Alpha | Oct 21, 2001 | Oct 28, 2001 | Nov 11, 2001 |
| № 9662 | N11 | W83 | 02 | 0060 | Beta | Oct 16, 2001 | Oct 23, 2001 | Nov 5, 2001 |
| № 9661 | N15 | W50 | 15 | 0410 | Beta-Gamma | Oct 18, 2001 | Oct 25, 2001 | Nov 8, 2001 |
| № 9658 | S15 | W75 | 07 | 0110 | Beta | Oct 16, 2001 | Oct 23, 2001 | Nov 6, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to October 2001. The gray background is the average SSN index.
