No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on January 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8442 | N24 | W16 | 08 | 0030 | BETA | Jan 18, 1999 | Jan 25, 1999 | Feb 8, 1999 |
| № 8440 | N19 | E16 | 42 | 0300 | BETA-GAMMA | Jan 20, 1999 | Jan 27, 1999 | Feb 10, 1999 |
| № 8439 | S24 | E14 | 40 | 0210 | BETA | Jan 20, 1999 | Jan 27, 1999 | Feb 10, 1999 |
| № 8437 | N10 | W24 | 01 | 0070 | ALPHA | Jan 17, 1999 | Jan 24, 1999 | Feb 7, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to January 1999. The gray background is the average SSN index.
