Full wave field recording of the vertical strain at SAFOD from local, regional and teleseismic earthquakes

William L Ellsworth, Stanford University, Department of Geophysics, Stanford, CA, United States, Martin Horst Karrenbach, OptaSense, Inc, Brea, United States and Mark A Zumberge, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States