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Dalton Minimum


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« Cosmic tree ring growth | Main | Sluggish flow inside the sun may cause late sunspot cycle »

October 22, 2009

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Stefano Di Battista

Top ten of years with most number of spotless days since 1849:
1913 311 days
1901 287
1878 280
2008 265
1856 260
1902 257
1912 254
1954 241
1933 240
2009 236 (October 21)

The year 2009 has surpassed the 234 spotless days of 1855.

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