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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 14, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8202 | S26 | E02 | 03 | 0010 | BETA | Apr 15, 1998 | Apr 22, 1998 | May 6, 1998 |
| № 8200 | S22 | W50 | 07 | 0090 | BETA | Apr 11, 1998 | Apr 18, 1998 | May 2, 1998 |
| № 8199 | S26 | W86 | 01 | 0000 | ALPHA | Apr 9, 1998 | Apr 16, 1998 | Apr 30, 1998 |
| № 8198 | S28 | W04 | 05 | 0020 | BETA | Apr 15, 1998 | Apr 22, 1998 | May 6, 1998 |
| № 8194 | S18 | W34 | 04 | 0210 | BETA | Apr 13, 1998 | Apr 20, 1998 | May 3, 1998 |
| № 8193 | S21 | W80 | 02 | 0100 | BETA | Apr 9, 1998 | Apr 16, 1998 | Apr 30, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to April 1998. The gray background is the average SSN index.
