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) | |
|---|---|---|---|---|---|---|---|---|
| № 8089 | N20 | W43 | 02 | 0010 | ALPHA | Sep 28, 1997 | Oct 5, 1997 | Oct 18, 1997 |
| № 8088 | S29 | W54 | 05 | 0210 | BETA | Sep 27, 1997 | Oct 4, 1997 | Oct 18, 1997 |
Solar cycle progression
Average monthly sunspot number (SSN) from 1968, January to 1997, September. Gray background - average solar cycle.
