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Organization Title

TriNet "ShakeMaps": Rapid Generation of Peak Ground Motion and Intensity Maps for Earthquakes in Southern California

by David J. Wald, V. Quitoriano, T.H. Heaton, H. Kanamori and C.W. Scrivner

Wald, David J., V. Quitoriano, T.H. Heaton, H. Kanamori and C.W. Scrivner (1998). TriNet "ShakeMaps": Rapid Generation of Peak Ground Motion and Intensity Maps for Earthquakes in Southern California. SMIP98 Seminar on Utilization of Strong-Motion Data, p. 155 - 175.

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Abstract

Rapid (3-5 minutes) generation of maps of ground motion shaking and intensity is accomplished with advances in real-time seismographic data acquisition combined with newly-developed relationships between recorded ground motion parameters and expected shaking intensity values. Estimation of shaking over the entire regional extent of southern California is accomplished by spatial interpolation of the measured ground motions with geologically-based, frequency and amplitude-dependent site corrections. Production of the maps is automatic, triggered by any significant earthquake in southern California. Maps are now made available within several minutes of the earthquake for public and scientific consumption via the World-Wide-Web; they will be made available with dedicated communications for emergency response agencies and critical users.