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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 18, 1997. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8042 | N25 | E43 | 01 | 0000 | ALPHA | May 23, 1997 | May 30, 1997 | Jun 12, 1997 |
| № 8041 | N04 | E21 | 02 | 0000 | BETA | May 21, 1997 | May 28, 1997 | Jun 10, 1997 |
| № 8040 | N03 | E38 | 03 | 0010 | BETA | May 22, 1997 | May 29, 1997 | Jun 11, 1997 |
| № 8038 | N24 | W85 | 01 | 0000 | ALPHA | May 13, 1997 | May 20, 1997 | Jun 3, 1997 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1968 to May 1997. The gray background is the average SSN index.
