Active areas
Sunspots and active regions
By the end of the day, the following active regions with sunspots could be observed on the Sun's surface
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 8454 | S22 | E04 | 02 | 0010 | BETA | Feb 5, 1999 | Feb 12, 1999 | Feb 26, 1999 |
| № 8453 | S26 | E32 | 09 | 0080 | BETA | Feb 7, 1999 | Feb 14, 1999 | Feb 28, 1999 |
| № 8452 | N19 | W70 | 01 | 0010 | ALPHA | Jan 31, 1999 | Feb 7, 1999 | Feb 20, 1999 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1970, January to 1999, February. Gray background - average solar cycle.
