No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 1, 1998. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8324 | N23 | W22 | 01 | 0000 | ALPHA | Aug 31, 1998 | Sep 7, 1998 | Sep 21, 1998 |
| № 8323 | S22 | E44 | 29 | 0890 | BETA-GAMMA | Sep 5, 1998 | Sep 12, 1998 | Sep 26, 1998 |
| № 8322 | N23 | W38 | 11 | 0090 | BETA | Aug 30, 1998 | Sep 6, 1998 | Sep 20, 1998 |
| № 8321 | N31 | E27 | 02 | 0010 | ALPHA | Sep 4, 1998 | Sep 11, 1998 | Sep 25, 1998 |
| № 8319 | N19 | W52 | 26 | 0740 | BETA | Aug 29, 1998 | Sep 5, 1998 | Sep 18, 1998 |
| № 8307 | N32 | W75 | 04 | 0090 | BETA | Aug 27, 1998 | Sep 3, 1998 | Sep 17, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to September 1998. The gray background is the average SSN index.
