Broadband ground motion simulation of the 2010-2011 Canterbury earthquake sequence

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Conference Contributions - Published
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Thesis discipline
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University of Canterbury. Civil and Natural Resources Engineering
University of Canterbury. QuakeCore
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Razafindrakoto, H.N.T.
Bradley, Brendon
Graves, R.W.

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 at same stations, we validate our simulations using both recordings and an empirically-developed ground motion prediction equation (GMPE). The simulation clearly captures the sedimentary basin amplification and the rupture directivity effects. Quantitative comparisons of the simulations with both recordings and the GMPE, as well as analyses of the total residuals (indicating model bias) show that simulations perform better than the empirical GMPE, especially for long period. To scrutinize the ground motion variability, we partitioned the total residuals into different components. The total residual appears to be unbiased, and the use of a 3D velocity structure reduces the long period systematic bias particularly for stations located close to the Banks Peninsula volcanic area.

Razafindrakoto, H.N.R., Bradley, B.A., Graves, R.W. (2016) Broadband ground motion simulation of the 2010-2011 Canterbury earthquake sequence. Christchurch, New Zealand: New Zealand Society for Earthquake Engineering Annual Conference, 1-3 April 2016. 8.
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
Fields of Research::46 - Information and computing sciences::4602 - Artificial intelligence::460207 - Modelling and simulation