When COVID-19 forced the postponement of the in-person SSA Seismic
Tomography meeting, Co-Chairs Andreas Fichtner of ETH Zürich and Clifford
Thurber of the University of Wisconsin-Madison decided to keep the science
going with a series of virtual technical sessions. The goal: to provide a
forum for excellent research and to keep up a lively exchange of ideas
within the tomography community.