12 citations · 41 across the 12 of their papers we have counts for
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astro-ph.SR2022★ 6 cited
Exploring the Connection between Helioseismic Travel Time Anomalies and the Emergence of Large Active Regions during Solar Cycle 24
John Stefan, Alexander Kosovichev
We investigate deviations in the mean phase travel time of acoustic waves preceding the emergence of 46 large active regions observed by the Helioseismic and Magnetic Imager (HMI).…
astro-ph.SR2022★ 2 cited
Analysis and Modeling of High-Frequency Emission and Deep Seismic Sources of Sunquakes
John T. Stefan, Alexander G. Kosovichev
Recent work published by Lindsey et al find evidence for a deep and compact seismic source for the sunquake associated with the 2011 July 30 M9.3 flare, as well as seismic emission…
astro-ph.SR2022★ 2 cited
Detection of Travel Time Anisotropy from Subsurface Horizontal Magnetic Fields
John T. Stefan, Alexander G. Kosovichev
A time-distance measurement technique is derived to isolate phase travel time anisotropy caused by subsurface horizontal magnetic fields, and a method which uses the measured aniso…