GEHRELS, George¹, PECHA, Mark², DICKINSON, William R.², KARLSTROM, Karl E.³, DOE, Michael F.⁴, and BLAKEY, Ronald⁵, (1) Geosciences, Univ of Arizona, Tucson, AZ 85721, ggehrels@email.arizona.edu, (2) Department of Geosciences, University of Arizona, Tucson, AZ 85721, (3) Department of Earth and Planetary Science, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, (4) Department of Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401, (5) Geology, Northern Arizona University, Box 4099, Flagstaff, AZ 86011

WEIL, Arlo Brandon, Department of Geology, Bryn Mawr College, Bryn Mawr, PA 19010, aweil@brynmawr.edu and YONKEE, Adolph, Department of Geosciences, Weber State University, 2507 University Circle, Ogden, UT 84408

ANDRONICOS, Christopher L., Earth and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907, candroni@purdue.edu

ROESKE, Sarah M., Geology Department, University of California, Davis, Davis, CA 95616, smroeske@ucdavis.edu, SALTUS, Richard W., MS 964, U.S. Geological Survey, Federal Center, Box 25046, Denver, CO 80225-0046, and TILL, Alison B., USGS, 4210 University Dr, Anchorage, AK 99508

BURGMANN, Roland, Univ California - Berkeley, 385 McCone Hall, Berkeley, CA 94720-4768, burgmann@seismo.berkeley.edu, THATCHER, Wayne, U.S. Geological Survey, Menlo Park, 345 Middlefield Road, Menlo Park, CA 94025, and SIMPSON, Robert W., U.S. Geological Survey, 345 Middlefield Rd, Menlo Park, CA 94025

PORRITT, Robert W., University of Southern California, Department of Earth Sciences, 3651 Trousdale Parkway, Los Angeles, CA 90089, rporritt@usc.edu

STOCK, Joann M., Seismological Laboratory, California Institute of Technology, 1200 E California Blvd, MC 252-21, Pasadena, CA 91125, jstock@gps.caltech.edu

CARLSON, Richard W., Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC, DC 20015-1305, rcarlson@ciw.edu