10 Works

New Zealand Paleoseismic Site Database: design and overview of version 1.0

Nicola J. Litchfield, Jade Humphrey, Regine Morgenstern, Robert M. Langridge, Genevieve L. Coffey & Russ J. Van Dissen
The New Zealand Paleoseismic Site Database (new term, new database) contains paleoseismic data (grouped into Slip Rate, Earthquake [EQ] Timings and Recurrence Interval [RI], and Single-Event Displacement [SED]) collected at specific sites along active faults throughout New Zealand. The database was developed as part of the New Zealand National Seismic Hazard Model 2022 Revision Project (NSHM 2022). The primary purpose is to compile paleoseismic data at specific sites to be used either as inputs into,...

2021 New Zealand Ground-Motion Database

Jesse Hutchinson, Brendon A. Bradley, Robin Lee, Liam Wotherspoon, Mike Dupuis, Claudio Schill, Jason Motha, Anna E. Kaiser & Elena F. Manea
This report summarises the development of the 2021 New Zealand ground-motion database. Ground-motion intensity measures have been computed from strong-motion recordings for events with moment (and moment-equivalent) magnitudes equal to or greater than 4.0 from the year 2000 until the end of 2020. These measures include peak ground acceleration, peak ground velocity, cumulative absolute velocity, Arias intensity and pseudo-acceleration response spectra, among others. Along with these intensity measures, we have determined and/or collated earthquake rupture...

New Zealand Community Fault Model - version 1.0

Hannu Seebeck, Russ J. Van Dissen, Nicola J. Litchfield, P. M. Barnes, Andy Nicol, Rob M. Langridge, David J. A. Barrell, Pilar Villamor, Susan M. Ellis & Mark S. Rattenbury
Fault models developed by the scientific community aim to provide a consistent and broadly agreed-upon representation of faults in a region for such societally important endeavours as seismic hazard assessment (e.g. national seismic hazard models), strong ground-motion predictions and physics-based fault systems modelling. The New Zealand Community Fault Model (NZ CFM) is a two- and three-dimensional representation of fault zones associated with the New Zealand plate boundary for which Quaternary activity has been established (or...

New Zealand National Seismic Hazard Model 2022 revision : model, hazard and process overview

Matt E. Gerstenberger, Sanjay S. Bora, Brendon A. Bradley, Chris DiCaprio, Russ J. Van Dissen, G. M. Atkinson, Chris Chamberlain, Annemarie Christophersen, Kate J. Clark & Genevieve L. Coffey
The New Zealand National Seismic Hazard Model (NSHM) 2022 revision has involved significant revision of all datasets and model components. In this report, we present a subset of the many results from the model, as well as an overview of the governance, scientific and review processes followed by the NSHM team. The NSHM 2022 models and results are available online, and more extensive results can be found at http://gns.cri.nz/nshm. (The authors)

Evaluation of empirical ground-motion models for New Zealand application

R. L. Lee, Brendon A. Bradley, Elena F. Manea & J. Hutchinson
This report presents an evaluation of empirical ground-motion models for shallow crustal, subduction interface and subduction slab earthquakes using a recently developed New Zealand ground-motion database. The evaluation considers both New-Zealand-specific and international models, which require validation to ensure their applicability in a New Zealand context. A quantitative comparison between the models is undertaken based on intensity measure residuals and a mixed-effects regression framework. The results are subsequently investigated to assess how the models are...

New Zealand National Seismic Hazard Model 2022: earthquake recurrence derivation from paleoseismic data and probability of detection

Genevieve L. Coffey, Chris Rollins, Russ J. Van Dissen, David A. Rhoades, Kiran K.S. Thingbaijam, Kate J. Clark, Matt C. Gerstenberger, Nicola J. Litchfield & Andy Nicol
This report presents results of recurrence interval derivation and probability of surface rupture detection studies undertaken for the New Zealand National Seismic Hazard Model 2022 (NSHM) update. Recurrence intervals are one of numerous inversion constraints that are used to constrain the rate of fault ruptures. Here, we utilise earthquake timings, single-event displacement and slip-rate data from the Paleoseismic Site Database, along with geologic and geodetic slip rates from the New Zealand Community Fault Model v1.0...

Summary of the ground-motion characterisation model for the 2022 New Zealand National Seismic Hazard Model

Brendon A. Bradley, Sanjay Bora, R. L. Lee, Elena F. Manea, Matt C. Gerstenberger, P. J. Stafford, G. M. Atkinson, G. Weatherill, J. Hutchinson & C. A. de la Torre
This document provides a high-level summary of the ground-motion characterisation model component of the 2022 New Zealand National Seismic Hazard Model. This includes: development of a New-Zealand-specific ground-motion database; consideration of alternative empirical ground-motion models based on global datasets; two new New-Zealand-specific models that were developed as part of the project; comparisons of the alternative models against observational data; and considered modifications of the ‘base’ models to account for near-fault directivity, back-arc attenuation for subduction...

An augmented New Zealand earthquake catalogue, event classifications, and models of the depth distribution of shallow earthquakes in the greater New Zealand region

Chris Rollins, Kiran K. S. Thingbaijam, J. Hutchinson, Matt C. Gerstenberger, Annemarie Christophersen, Donna Eberhart-Phillips, Sepideh J. Rastin & Russ J. Van Dissen
A serviceable seismic hazard model for New Zealand requires an earthquake catalogue with accurate and representative data about earthquake locations, depths, magnitudes and other parameters, as well as uncertainties on those data. Usable depth (and focal mechanism) data are particularly necessary in the Hikurangi and Puysegur subduction regions in order to distinguish whether earthquakes in those regions are in the upper plate, on the subduction interface or in the down-going slab, as these three regimes...

Combining observed linear basin amplification factors with 1D nonlinear site-response analyses to predict site response for strong ground motions: application to Wellington, New Zealand

Christopher de la Torre, Brendon A. Bradley, Felipe Kuncar, Robin L. Lee, Liam M. Wotherspoon & Anna E. Kaiser
This study develops a method for estimating site amplification that combines instrumentally observed site-specific amplification factors with modification factors from nonlinear site-response analyses. This approach provides estimates of site response for large-strain motions based on observations and sophisticated nonlinear modelling. A database of weak- to moderate-intensity ground motions recorded in three basins of Wellington, New Zealand, is used to study the observed site amplification. A subset of nine strong-motion stations was selected to perform nonlinear...

3D geological modelling of Wellington Quaternary sediments and basin geometry

Matt P. Hill, Anna E. Kaiser, L. M. Wotherspoon, Elena F. Manea, R. L. Lee, C. A. de la Torre & B. A. Bradley
This project has developed two new three-dimensional (3D) models of geological and geotechnical properties for Wellington: one regional-scale model from the Cook Strait north to Porirua; and the other city-scale model encompassing the Thorndon, Wellington central business district (CBD), Te Aro and Miramar areas. The models were created using the latest geomorphic and geological map interpretations, a borehole database and new geophysical investigations. The models interpret the accumulations of loose to dense Quaternary sediment deposited...

Registration Year

  • 2022
    10

Resource Types

  • Text
    10

Affiliations

  • GNS Science
    10
  • University of Canterbury
    10
  • University of Auckland
    3
  • Western University
    1
  • Imperial College London
    1
  • National Institute of Water and Atmospheric Research
    1
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    1