We present seismic-hazard maps computed using an OpenSHA (Field et al., 2003; http://www.OpenSHA.org/) application that makes use of distributed grid computing. A seismic-hazard map gives the probability that some intensity-measure level will be exceeded over a chosen time span (alternatively, one might plot the exceedance level at a particular probability). One of the two main model components needed to generate such a map is an Earthquake-Rupture Forecast (ERF), which gives a complete inventory of all possible earthquake ruptures in the region, above some magnitude threshold, and over a specified time span. The other model component is an...

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