in July 2015 http://www.sidc.be/silso/datafiles WDC-SILSO, Royal Observatory of Belgium, Brussels in July 2015 SILSO http://sidc.be/silso/datafiles in July 2015 http://www.sidc.be/silso/datafiles SUNSPOT NUMBER (SILSO) WDC-SILSO, Royal Observatory of Belgium WDC-SILSO, Royal Observatory of Belgium, Brussels http://www.sidc.be/silso/datafiles Sunspot Index and Long-term Solar Observations in July 2015 SILSO (Sunspot Index and Long-term Solar Observations) http://www.sidc.be/silso/datafiles WDC-SILSO, Royal Observatory of Belgium, Brussels in July 2015 www.sidc.be/silso/datafiles WDC-SILSO, Royal Observatory of Belgium, Brussels WDC-SILSO, Royal Observatory of Belgium, Brussels WDC-SILSO, Royal Observatory of Belgium, Brussels Sunspot numbers http://sidc.be/silso/datafiles in July 2015 http://www.sidc.be/silso/datafiles Solar Sunspot Number Data WDC-SILSO, Royal Observatory of Belgium, Brussels in July 2015 WDC-SILSO, Royal Observatory of Belgium, Brussels monthly averages of daily sunspot counts SIDC/SILSO monthly mean sunspot number WDC-SILSO, Royal Observatory of Belgium, Brussels http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles in July 2015 publicly available http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles SSN znajduje się na najniższym od ponad stulecia poziomie http://www.sidc.be/silso/datafiles in July 2015 SILSO http://www.sidc.be/silso/datafiles Sunspot data 1800 until now in July 2015 WDC-SILSO, Royal Observatory of Belgium, Brussels http://www.sidc.be/silso/datafiles Version 2.0 der SSN monthly averages of daily sunspot counts WDC-SILSO, Royal Observatory of Belgium, Brussels SSN http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles SIDC, Brussels site http://www.sidc.be/silso/datafiles http://sidc.be/silso/datafiles SIDC/SILSO Sunspot Index and Long-term Solar Observations http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles in July 2015 http://sidc.be/silso/datafiles#total in July 2015 http://www.sidc.be/silso/datafiles http://sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles in July 2015 http://sidc.be/silso/datafiles#total WDC-SILSO, Royal Observatory of Belgium, Brussels in July 2015 SILSO Sunspot Number in July 2015 in July 2015 http://sidc.be/silso/datafiles www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles in July 2015 WDC-SILSO, Królewskie Obserwatorium w Belgii, Bruksela http://www.sidc.be/silso/datafiles http://sidc.be/silso/datafiles in July 2015 Sunspot Index and Long-term Solar Observations group http://sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles the WDC-SILSO, Royal Observatory of Belgium, Brussels Sunspot Index and Long-term Solar Observations (SILSO) in July 2015 www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles At SIDC in July 2015 SSN Sunspot Number (SSN) http://www.sidc.be/silso/datafiles publicly available http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles http://www.sidc.be/silso/datafiles publicly available