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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 14, 1999. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8733 | N24 | W11 | 03 | 0010 | BETA | Oct 14, 1999 | Oct 21, 1999 | Nov 4, 1999 |
| № 8732 | N19 | E30 | 10 | 0230 | BETA | Oct 17, 1999 | Oct 24, 1999 | Nov 7, 1999 |
| № 8731 | N11 | E39 | 38 | 0620 | BETA-GAMMA | Oct 18, 1999 | Oct 25, 1999 | Nov 7, 1999 |
| № 8729 | N11 | E19 | 30 | 0110 | BETA | Oct 16, 1999 | Oct 23, 1999 | Nov 6, 1999 |
| № 8728 | N23 | E17 | 26 | 0520 | BETA | Oct 16, 1999 | Oct 23, 1999 | Nov 6, 1999 |
| № 8727 | N21 | W22 | 09 | 0040 | BETA | Oct 13, 1999 | Oct 20, 1999 | Nov 3, 1999 |
| № 8725 | S25 | W37 | 01 | 0010 | ALPHA | Oct 12, 1999 | Oct 19, 1999 | Nov 2, 1999 |
| № 8719 | S20 | W82 | 01 | 0060 | ALPHA | Oct 9, 1999 | Oct 15, 1999 | Oct 29, 1999 |
| № 8716 | N22 | W72 | 02 | 0140 | ALPHA | Oct 9, 1999 | Oct 16, 1999 | Oct 30, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to October 1999. The gray background is the average SSN index.
