Reece Phillip Elling, Northwestern University, Department of Earth and Planetary Sciences, Evanston, IL, United States, Seth Stein, Northwestern Univ, Department of Earth & Planetary Sciences, Evanston, IL, United States, Carol A Stein, Univ. of Illinois at Chicago, Chicago, IL, United States and Mitchell Barklage, Nodal Seismic, Saint Charles, MO, United States