The Maunder minimum (1645 .. 1715) was indeed a grand minimum

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This grand paper examines many lines of evidence, many well known authors, enjoy the feast

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The Maunder minimum (1645–1715) was indeed a grand minimum:
A reassessment of multiple datasets
Ilya G. Usoskin, Rainer Arlt , Eleanna Asvestari, Ed Hawkins, Maarit Käpylä, Gennady A. Kovaltsov, Natalie Krivova, Michael Lockwood, Kalevi Mursula, Jezebel O’Reilly, Matthew Owens, Chris J. Scott, Dmitry D. Sokoloff, Sami K. Solanki, Willie Soon and José M. Vaquero

Astronomy & Astrophysics, accepted July 2015, 19 pages, access on registration
http://dx.doi.org/10.1051/0004-6361/201526652

ABSTRACT
Aims. Although the time of the Maunder minimum (1645–1715) is widely known as a period of extremely low solar activity, it is still being debated whether solar activity during that period might have been moderate or even higher than the current solar cycle #24. We have revisited all existing evidence and datasets, both direct and indirect, to assess the level of solar activity during the Maunder minimum.

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