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This paper compares past and current earthquake hazard estimates for Newcastle computed using a range of earthquake recurrence models, and several ground motion models. It compares the resulting earthquake hazard estimates. Estimates are all for soft bedrock motion, or Vs30 = 760 m/s where relevant. There are at least eight phenomena associated wit...
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... with 1997 models, the 2008 NGA models are more consistent, behave better at extremes of magnitude, distance and frequency, and have smoother spectral shapes Spectra from AUS5 Model with pre-NGA and NGA ground motion Figure 11: Newcastle uniform probability response spectra, log-linear. Figure 11 shows that the NGA model spectra are much more consistent at long periods than the spectra from pre-NGA models. ...
Context 2
... with 1997 models, the 2008 NGA models are more consistent, behave better at extremes of magnitude, distance and frequency, and have smoother spectral shapes Spectra from AUS5 Model with pre-NGA and NGA ground motion Figure 11: Newcastle uniform probability response spectra, log-linear. Figure 11 shows that the NGA model spectra are much more consistent at long periods than the spectra from pre-NGA models. This is to be expected given that magnitudes are defined by long period motion or displacements, which are less affected by variation in attenuation than short period motion. ...
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