REDI to Simulate Strong Motions: Finite Fault Inversion and its Implementation

Anastasia Kaverina, UC Berkeley Seismological Laboratory

We are developing a new module of the Rapid Earthquake Data Integration System (REDI) which will enable the near-real-time determination of strong shaking maps throughout Northern California, including areas of sparse local strong motion instrument coverage. The method we are implementing seamlessly transitions from pure data controlled shakemaps, such as produced by the TriNet ShakeMap version 2 methodology, to maps which include empirical corrections for directivity, and the direct simulation of strong ground motions from earthquake specific finite-source models. The finite fault inversion is essential for the directivity determination. The results of the inversion for the Hector Mine event are presented and discussed in context of resulting strong motion estimates.