No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on October 28, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8746 | S15 | E29 | 04 | 0010 | BETA | Oct 31, 1999 | Nov 7, 1999 | Nov 21, 1999 |
| № 8745 | S14 | E55 | 02 | 0150 | ALPHA | Nov 2, 1999 | Nov 9, 1999 | Nov 23, 1999 |
| № 8744 | N09 | E17 | 05 | 0010 | BETA | Oct 30, 1999 | Nov 6, 1999 | Nov 20, 1999 |
| № 8743 | S14 | W06 | 03 | 0020 | BETA | Oct 28, 1999 | Nov 4, 1999 | Nov 18, 1999 |
| № 8742 | N08 | E30 | 25 | 0480 | BETA | Oct 31, 1999 | Nov 7, 1999 | Nov 21, 1999 |
| № 8741 | S25 | W02 | 19 | 0190 | BETA | Oct 29, 1999 | Nov 5, 1999 | Nov 19, 1999 |
| № 8739 | S12 | W22 | 42 | 0650 | BETA-GAMMA-DELTA | Oct 27, 1999 | Nov 3, 1999 | Nov 17, 1999 |
| № 8738 | N17 | W66 | 02 | 0090 | BETA | Oct 24, 1999 | Oct 31, 1999 | Nov 13, 1999 |
| № 8737 | S13 | W88 | 01 | 0140 | ALPHA | Oct 22, 1999 | Oct 29, 1999 | Nov 12, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to October 1999. The gray background is the average SSN index.
