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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8181 | S20 | E50 | 02 | 0000 | BETA | Mar 18, 1998 | Mar 25, 1998 | Apr 7, 1998 |
| № 8180 | S29 | E44 | 05 | 0010 | BETA | Mar 17, 1998 | Mar 24, 1998 | Apr 7, 1998 |
| № 8179 | S24 | E38 | 08 | 0030 | BETA | Mar 17, 1998 | Mar 24, 1998 | Apr 7, 1998 |
| № 8178 | S17 | E49 | 01 | 0100 | ALPHA | Mar 18, 1998 | Mar 24, 1998 | Apr 7, 1998 |
| № 8176 | S40 | E07 | 25 | 0140 | BETA | Mar 14, 1998 | Mar 22, 1998 | Apr 6, 1998 |
| № 8175 | N47 | E01 | 01 | 0020 | ALPHA | Mar 14, 1998 | Mar 22, 1998 | Apr 6, 1998 |
| № 8174 | S17 | W29 | 02 | 0000 | BETA | Mar 12, 1998 | Mar 18, 1998 | Apr 1, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to March 1998. The gray background is the average SSN index.
