697 citations · 1.6k across the 26 of their papers we have counts for
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Flaring Solar Hale Sector Boundaries
Leif Svalgaard, Iain G. Hannah
Magnetic fields and the occurrence of flares and microflares are strongly concentrated near that portion (the Hale boundary) in each solar hemisphere where the change in magnetic s…
Calibration of Sunspot Numbers
Leif Svalgaard
Waldmeier [1971] found a very tight relationship between the F10.7 solar radio flux and the sunspot number and suggested using the flux for an objective calibration of the sunspot…
Heliospheric Magnetic Field 1835-2009
Leif Svalgaard, Edward W. Cliver
We use recently acquired geomagnetic archival data to extend our long-term reconstruction of the HMF strength. The 1835-2009 HMF series is based on an updated and substantiated IDV…
Updating the Historical Sunspot Record
Leif Svalgaard
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 sunspo…
The Solar Microwave Flux and the Sunspot Number
Leif Svalgaard, Hugh S. Hudson
The solar F10.7 index is has been a reliable and sensitive activity index since 1947. As with other indices, it has been showing unusual behavior in the Cycle 23/24 minimum. The or…