No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 20, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8206 | N23 | E44 | 03 | 0020 | BETA | Apr 24, 1998 | May 1, 1998 | May 15, 1998 |
| № 8205 | N21 | W23 | 12 | 0070 | BETA | Apr 19, 1998 | Apr 26, 1998 | May 10, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to April 1998. The gray background is the average SSN index.
