Strong Ground Motion Simulations for Dunedin: First Steps using the SCEC Broadband Simulation Platform (2018)
Type of ContentConference Contributions - Other
- QuakeCORE: Posters 
Our poster will present on-going QuakeCoRE-founded work on strong motion seismology for Dunedin-Mosgiel area, focusing on ground motion simulations for Dunedin Central Business District (CBD). Source modelling and ground motion simulations are being carried out using the SCEC (Southern California Earthquakes Center) Broad Band simulation Platform (BBP). The platform computes broadband (0-10 Hz) seismograms for earthquakes and was first implemented at the University of Otago in 2016. As large earthquakes has not been experienced in Dunedin in the time of period of instrumental recording, user-specified scenario simulations are of great value. The Akatore Fault, the most active fault in Otago and closest major fault to Dunedin, is the source focused on in the present study. Simulations for various Akatore Fault source scenarios are run and presented.
Path and site effects are key components considered in the simulation process. A 1D shear wave velocity profile is required by SCEC BBP, and this is being generated to represent the Akatore-to-CBD path and site within the BBP. A 3D shear velocity model, with high resolution within Dunedin CBD, is being developed in parallel with this study (see Sangster et al. poster). This model will be the basis for developing a 3D shear wave velocity model for greater Dunedin-Mosgiel area for future ground motion simulations, using Canterbury software (currently under development).
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Kowal, Anna; Stirling, Mark; Gorman, Andrew; Wotherspoon, Liam (2019)We present our on-going QuakeCoRE-funded work on strong motion seismology for Dunedin–Mosgiel area, focusing on ground motion simulations for the Dunedin Central Business District (CBD). Source modelling and ground motion ...
Sangster, Catherine; kowal, Anna; Stirling, Mark; Gorman, Andrew; Wotherspoon, Liam (2018)The Akatore Fault is located to the southwest of Dunedin city and is thought to represent the most significant source of seismic hazard for the city. As Dunedin has not experienced a large earthquake in recorded history, ...
Kowal, Anna; Jeong, Seokho; Wotherspoon, Liam; Stirling, Mark (2020)The research addresses Dunedin-Mosgiel seismic hazard. We use scenario earthquakes from local active faults and 2D basin modelling to develop ground motion simulations for the two urban areas. The simulations utilise ...