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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 7, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8455 | S19 | E35 | 02 | 0010 | ALPHA | Feb 11, 1999 | Feb 17, 1999 | Mar 3, 1999 |
| № 8453 | S26 | W08 | 05 | 0040 | BETA | Feb 7, 1999 | Feb 14, 1999 | Feb 28, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to February 1999. The gray background is the average SSN index.
