C. Arnold V. Bertero R. Borcherdt G. Brady J. Fedock J. Gates R. Maley C. Mortgat C. Rojahn E. Safak H. Shah E. Zacker M. Çelebi 1984 application/pdf 10.3133/ofr84488 en U.S. Geological Survey, Report on recommended list of structures for seismic instrumentation in the San Francisco Bay region reports