Northwestern University, Department of Civil and Env. Engn. 2145 Sheridan Road, Evanston, IL 60208-3109 United States
State University of New York at Stony Brook, Department of Geosciences State University of New York at Stony Brook, Stony Brook, NY 11794 United States
State University of New York at Stony Brook, Department of Geosciences State University of New York at Stony Brook, Stony Brook, NY 11794 United States