697 citations · 1.6k across the 26 of their papers we have counts for
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astro-ph.SR2020
Several Populations of Sunspot Group Numbers -- Resolving a Conundrum
Leif Svalgaard
The long-standing disparity between the sunspot number record and the Hoyt and Schatten (1998, H&S) Group Sunspot Number series was initially resolved by the Clette et al. (2014) r…
astro-ph.SR2020
Calibration of the Sunspot and Group Numbers Using the Waldmeier Effect
Leif Svalgaard, David H. Hathaway
The Waldmeier Effect is the observation that the rise time of a sunspot cycle varies inversely with the cycle amplitude: strong cycles rise to their maximum faster than weak cycles…
astro-ph.SR2020★ 2 cited
Prediction of Solar Cycle 25
Leif Svalgaard
Prediction of solar cycle is an important goal of Solar Physics both because it serves as a touchstone for our understanding of the sun and also because of its societal value for a…