Source modelling considerations for ground motion simulation validation of moderate magnitude active shallow crustal earthquakes in New Zealand (2020)
This paper summarises progress toward NZ-wide physics-based hybrid broadband ground motion simulation validation of moderate magnitude (5.0 < Mw < 7.0), active shallow crustal earthquake events through low spatial resolution prototype runs with an emphasis on source modelling methods. 62 earthquakes were considered with 1692 observed ground motion recorded across 200 sites. The simulations are carried out using the Graves and Pitarka (2016) hybrid broadband ground motion simulation methodology with various source models, and crustal velocities prescribed from the NZVM 2.0 (Thomson et al. 2020). The simulation results are compared with the recorded ground motions through multiple ground motion intensity measures. In terms of model prediction bias, the simulations perform well at short period spectral accelerations (T < 0.3s) and overpredict to varying extents at other periods. Finite faults sources have less bias than point sources at long periods (T > 4s) and have lower total standard deviation at short periods (T < 2s). Future work includes simulating high spatial resolution production runs, improving source and site characterisation, and additional analyses of simulation predictive capability.
CitationLee R, Bradley BA, Graves R (2020). Source modelling considerations for ground motion simulation validation of moderate magnitude active shallow crustal earthquakes in New Zealand. Wellington, New Zealand: New Zealand Society for Earthquake Engineering Conference.
This citation is automatically generated and may be unreliable. Use as a guide only.
ANZSRC Fields of Research37 - Earth sciences::3706 - Geophysics::370609 - Seismology and seismic exploration
40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
RightsAll rights reserved unless otherwise stated
Showing items related by title, author, creator and subject.
Investigation of systematic ground motion effects through ground motion simulation of small-to-moderate magnitude earthquakes Bradley, Brendon; Lee RL; Graves RW; Rodriguez-Marek A; Stafford PJ (2017)
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 ...
Toward hybrid broadband ground motion simulation validation for New Zealand-wide Mw>3.5 earthquakes Lee R; Bradley, Brendon; Bellagamba X (2018)