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      • Peak ground velocity ShakeMaps derived from geodetic slip models

        Rhie, Junkee,Dreger, Douglas S.,Murray, Mark,Houlié,, Nicolas Blackwell Publishing Ltd 2009 Geophysical journal international Vol.179 No.2

        <P>SUMMARY</P><P>We develop a methodology to derive fast and reliable peak ground velocity (PGV) ShakeMaps from kinematic finite-source models of earthquake rupture inferred from geodetic static displacements. The temporal variations in slip on the fault are based on the simple assumption that larger slip takes longer time to accumulate. Assuming constant rupture and slip velocities, slip is distributed in time to produce a variable rise-time model. Sensitivity tests on finite-source models of the 1994 <I>M</I><SUB>w</SUB> 6.7 Northridge, California earthquake show that distribution of peak ground velocities derived using 3.0 km s<SUP>−1</SUP> rupture velocity and 76.8 cm s<SUP>−1</SUP> slip velocity matches, to a large extent, observed PGV, suggesting that rapid assessment of strong ground motions derived from geodetic data can aid emergency response, particularly in areas with sparse seismic station coverage.</P>

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