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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 1256 | N08 | E23 | 02 | 0020 | Beta | Jul 20, 2011 | Jul 26, 2011 | Aug 9, 2011 |
| № 1254 | S22 | E38 | 07 | 0050 | Beta | Jul 21, 2011 | Jul 28, 2011 | Aug 11, 2011 |
| № 1252 | N25 | E34 | 01 | 0000 | Alpha | Jul 20, 2011 | Jul 27, 2011 | Aug 10, 2011 |
| № 1251 | N16 | E06 | 02 | 0070 | Alpha | Jul 18, 2011 | Jul 25, 2011 | Aug 8, 2011 |
| № 1250 | S26 | W32 | 01 | 0080 | Alpha | Jul 15, 2011 | Jul 22, 2011 | Aug 5, 2011 |
| № 1245 | N14 | W63 | 02 | 0010 | Beta | Jul 13, 2011 | Jul 20, 2011 | Aug 3, 2011 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1982 to July 2011. The gray background is the average SSN index.
