Earth & Space Research, 3350 SW Cascade Ave., Corvallis, OR 97333 United States
Institute of Geophysics and Planetary Physics, Scripps Institution fo Oceanography, University of California, Sab Diego, La Jolla, CA 92093 United States
School of Civil Engineering and Geoscience, Cassie Building, University of Newcastle, Newcastle upon Tyne, NE1 7RU United Kingdom ;