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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8222 | N21 | E56 | 05 | 0080 | BETA | May 19, 1998 | May 26, 1998 | Jun 8, 1998 |
| № 8221 | S09 | W63 | 01 | 0000 | ALPHA | May 10, 1998 | May 16, 1998 | May 30, 1998 |
| № 8220 | S27 | E53 | 09 | 0120 | BETA | May 18, 1998 | May 25, 1998 | Jun 8, 1998 |
| № 8218 | S20 | W09 | 24 | 0210 | BETA | May 14, 1998 | May 21, 1998 | Jun 3, 1998 |
| № 8217 | S16 | W61 | 01 | 0050 | ALPHA | May 10, 1998 | May 17, 1998 | May 30, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to May 1998. The gray background is the average SSN index.
