Paper:	Updating the Historical Sunspot Record
Volume:	428, SOHO-23: Understanding a Peculiar Solar Minimum
Page:	297
Authors:	Svalgaard, L.
Abstract:	We review the evidence for the argument that Rudolf Wolf’s calibration of the Sunspot Number is likely to be correct and that Max Waldmeier introduced an upwards jump in the sunspot number in 1945. The combined effect of these adjustments suggests that there has been no secular change in the sunspot number since coming out of the Maunder Minimum (∼1715).

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