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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 18, 2011. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1217 | S23 | W17 | 02 | 0010 | Beta | May 18, 2011 | May 24, 2011 | Jun 7, 2011 |
| № 1216 | S15 | E56 | 01 | 0080 | Alpha | May 23, 2011 | May 30, 2011 | Jun 13, 2011 |
| № 1214 | S24 | W22 | 12 | 0060 | Beta | May 17, 2011 | May 24, 2011 | Jun 7, 2011 |
| № 1208 | N09 | W76 | 02 | 0010 | Beta | May 13, 2011 | May 20, 2011 | Jun 2, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to May 2011. The gray background is the average SSN index.
