Ongoing development of a 3D seismic velocity model for Canterbury, New Zealand for broadband ground motion simulation (2014)
PublisherUniversity of Canterbury. Civil and Natural Resources Engineering
This paper presents the ongoing development of a new 3D seismic velocity model of Canterbury, New Zealand. The model explicitly represents the Canterbury sedimentary basin, and other significant geologic horizons, which are expected to have important implications on observed ground motions. The model utilizes numerous sources of data, including 3D regional tomography with a variable-depth inferred Moho, seismic reflection survey lines, geotechnical boreholes and well logs, spectral analysis of surface waves, and CPT logs which provide velocity constraints over their respective ranges of application. The model provides P- and S-wave velocity and density (i.e. Vp, Vs and p) over a grid of input points, and is presently being utilized in broadband ground motion simulations of the 2010-2011 Canterbury earthquakes. Comparison of simulated ground motions with those observed in the 2010-2011 Canterbury earthquakes will help provide a better understanding of the salient physical processes which characterized the unique set of strong ground motions recorded in this sequence of earthquake events.
CitationLee, R.L., Bradley, B.A., Pettinga, J., Hughes, M., Graves, R.W. (2014) Ongoing development of a 3D seismic velocity model for Canterbury, New Zealand for broadband ground motion simulation. Auckland, New Zealand: 2014 New Zealand Society for Earthquake Engineering Conference (NZSEE), 21-23 Mar 2014. 8pp.
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ANZSRC Fields of Research40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
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Lee, R.L.; Bradley, Brendon; Pettinga, J.R.; Hughes, M.; Graves, R.W. (University of Canterbury. Civil and Natural Resources EngineeringUniversity of Canterbury. Geological Sciences, 2013)his poster presents the ongoing development of a 3D Canterbury seismic velocity model which will be used in physics-based hybrid broadband ground motion simulation of the 2010-2011 Canterbury earthquakes. Velocity models ...
Lee, R.L.; Bradley, Brendon; Ghisetti, F.; Pettinga, J.R.; Hughes, M.W.; Thomson, E.M. (University of Canterbury. Civil and Natural Resources Engineering, 2014)This poster presents the on-going development of a new 3D seismic velocity model of Canterbury, New Zealand. The intention of the model is to provide the 3D crustal structure in the region at multiple length scales for ...
Razafindrakoto, H.N.T.; Bradley, Brendon; Graves, R.W. (University of Canterbury. Civil and Natural Resources EngineeringUniversity of Canterbury. QuakeCore, 2016)In this paper, we perform hybrid broadband (0-10 Hz) ground motion simulations for the ten most significant events (Mw 4.7-7.1) in the 2010-2011 Canterbury earthquake sequence. Taking advantage of having repeated recordings ...