NGA-West2 Ground Motion Model for the Average Horizontal Components of PGA, PGV, and 5% Damped Linear Acceleration Response Spectra
Kenneth W. Campbella)
M.EERI, and Yousef Bozorgniab)
M.EERI
We used an expanded PEER NGA-West2 database to develop a new ground
motion prediction equation (GMPE) for the average horizontal components of
PGA, PGV, and 5% damped linear pseudo-absolute acceleration response spectra
at 21 periods ranging from 0.01 s to 10 s. In addition to those terms included in
our now superseded 2008 GMPE, we include a more-detailed hanging wall
model, scaling with hypocentral depth and fault dip, regionally independent geometric
attenuation, regionally dependent anelastic attenuation and site conditions,
and magnitude-dependent aleatory variability. The NGA-West2 database provides
better constraints on magnitude scaling and attenuation of small-magnitude
earthquakes, where our 2008 GMPE was known to be biased. We consider our
new GMPE to be valid for estimating horizontal ground motion from shallow
crustal continental earthquakes in an active tectonic domain for rupture distances
ranging from 0 km to 300 km and magnitudes ranging from 3.3 to 7.5–8.5,
depending on source mechanism. [DOI: 10.1193/062913EQS175M]
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