Computer simulations of earthquake shaking can provide valuable information on the expected intensity of shaking from earthquakes. Arthur Rodgers, a seismologist/geophysicist at Lawrence Livermore National Laboratory, covers seismic hazard in the Bay Area, describes computer simulations of past and possible future earthquakes and looks at the physics that underlies the numerical methods. Series: "Lawrence Livermore National Lab Science on Saturday" [Science] [Show ID: 29612]