National Earthquake Hazards Reduction Program: Summaries of Technical Reports, Volume XXI |
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345 Middlefield Road activity aftershocks Alaska analysis array Basin Borah Peak borehole California Canyon Coalinga Creek creep creepmeter crustal Cushman deformation depth developed displacement earthquake hazards epicenters estimates evaluation fault zone Figure focal mechanisms foreshock frequency Geological Survey 345 Geological Survey U.S. Geophys Geophysical ground motion Holocene hypocenters indicate installed instrument Investigations Lake located Long Valley caldera magnitude main shock measurements Menlo Park meters Middlefield mm/yr monitoring Morgan Hill observed occurred P-wave Parkfield Parkfield earthquake prediction processing Quaternary range recorded region Results rocks rupture San Andreas fault San Gabriel fault scarps segment seismic gap seismograms Seismology shallow shear Shumagin slip rate soil southern California stations strain stress drop structure subduction surface Survey 345 Middlefield Survey U.S. Geological tectonic terrace tilt tiltmeter U.S. Geological Survey University uplift USGS Utah velocity volcanic Wasatch waves