Abstract

This article reports on the state of physics governing the behavior of earthquakes and faults, based on discussions held during a workshop of the Southern California Earthquake Center (SCEC) suggested by Tom Henyey and convened by Yehuda Ben-Zion and Charles Sammis at Snowbird, Utah, June 21-23, 1998. The objective of the workshop was to assess the current state of understanding of earthquake processes including event nucleation, propagation and arrest of ruptures, spatiotemporal seismicity patterns, interactions between faults, and evolution of fault systems. A better understanding of the earthquake process should enable scientists to develop seismic hazard assessment tools based upon improved estimates of the locations and sizes of future earthquakes and the time-dependent probabilities of their occurrence. It will allow incorporation of realistic simulations of dynamic rupture and wave propagation into hazard models so that time histories of strong ground-shaking from scenario earthquakes needed in performance-based seismic design of structures...

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