1. Department of Civil and Environmental Engineering; Stanford University; 473 Via Ortega Stanford CA 94305
2. Center for Geophysical Investigation of the Subsurface, Department of Geosciences; Boise State University; 1910 University Drive Boise ID 83705
3. Center for Applied Geoscience; University of Tübingen; Tübingen Germany.
4. Department of Geoscience; University of Wisconsin-Madison; Madison WI.
5. Dipartimento di Ingegneria per l'Ambiente e il Territorio e Ingegneria Chimica; Università della Calabria; via P Bucci 42B 87036 Rende Italy.