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Development of the 2018 Australian National Seismic Hazard Assessment (NSHA)

Geoscience Australia
Griffin, J. ; Volti, T. ; Clark, D. ; Ghasemi, H. ; Leonard, M. ; Allen, T.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
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Creative Commons Attribution 4.0 International Licence
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clientservices@ga.gov.au

Brief description

The 2018 revision of Australia's National Seismic Hazard Assessment (NSHA18) represents a substantial improvement from the 2013 NSHA. In particular, this revision will include a fault source models, an improved and more homogeneous earthquake catalogue, and greater epistemic uncertainty through a call for third party source models. This paper presents updated models of seismicity and ground motion that are currently being developed at Geoscience Australia for the NSHA. We use the OpenQuake software to calculate seismic hazard for Australia and compare with OpenQuake implementations of third-party models and the 2013 NSHA. Weighting of logic tree branches for alternative models are discussed, and how these relate to the fundamental datasets on which they are based. A smoothed seismicity model is developed based on recent seismicity while source models derived from neotectonic fault data consider a much longer time history. Final weightings, including for third party models, will be determined in consultation with members of the Australian seismological community.

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Purpose
Conference paper for Australian Earthquake Engineering Society 2016 Conference, Nov 25-27, Melbourne, Vic

Created: 14 09 2016

Issued: 17 08 2020

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-180,-86 -180,86

-180,0

text: westlimit=-180; southlimit=-90.00; eastlimit=-180; northlimit=90.00

Subjects
EARTH SCIENCES | Published_External | area source model | fault source model | geoscientificInformation | national seismic hazard assessment | smoothed seismicity |

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Other Information
Link to the article (pdf)

uri : http://aees.org.au/wp-content/uploads/2018/06/340-Griffin-et-al.pdf

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