Product catalogue
The 2023 National Seismic Hazard Assessment of Australia Rationale for changes in hazard
<div>Geoscience Australia, together with contributors from the wider Australian seismology community, have produced a new National Seismic Hazard Assessment (NSHA23), recommended for inclusion in proposed updates to Standards Australia’s AS1170.4. NSHA23 builds on the model framework developed for NSHA18, and incorporates scientific advances and stakeholder feedback received since development of that model. Key changes include: further refinement and homogenisation of the earthquake catalogue; revisions to the fault source model through inclusion of newly identified faults and revised activity rates on some faults; assessment of ground motion models through quantitative comparison against observations; and inclusion of a specific ground motion model for shaking from plate-boundary earthquakes in northern Australia. Expert elicitation was used to capture epistemic uncertainty surrounding model choices. The elicitation focused on decision points that sensitivity analysis had shown were more important for hazard, where new models had been developed, and where model choices had been controversial in NSHA18. Key questions included which catalogue to use as the basis for calculating hazard, the weighting of different source model classes (background, regional, seismotectonic, smoothed seismicity and smoothed seismicity with faults), and the selection and weighting of ground motion models for different tectonic regions. NSHA23 hazard results for capital cities show minor changes compared with NSHA18, with the exception of Darwin. Here the ground motion with a 10% probability of exceedance in 50 years increases significantly, a result that is attributed to inclusion of a new, more realistic ground motion model for plate-boundary earthquakes in this unique tectonic setting.</div><div><br>This paper was presented to the 2023 Australian Earthquake Engineering Conference 23-25 November 2023 ( https://aees.org.au/aees-conference-2023/)</div>
Simple
Identification info
- Date (Creation)
- 2023-09-29
- Date (Publication)
- 2023-12-18T06:54:39
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/148939
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Griffin, J.
Internal Contact Author Allen, T.
Internal Contact Author Clark, D.
Internal Contact Author Cummins, P.
Internal Contact Author Ghasemi, H.
Internal Contact Author Ebrahimi, R.
External Contact
- Name
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Australian Earthquake Engineering Conference 23-25 November 2023
- Purpose
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Conference paper on the National Seismic Hazard Assessment for the 2023 Australian Earthquake Engineering Conference
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Resource provider Place and Communities Division
External Contact Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Griffin, J.
Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Project
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seismic hazard assessment
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- Keywords
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ground motion model
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- Keywords
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expert elicitation
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- theme.ANZRC Fields of Research.rdf
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Natural Hazards
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Addressee
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Role Organisation / Individual Name Details User Any
- Use constraints
- License
- Use constraints
- Other restrictions
- Other constraints
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© Commonwealth of Australia (Geoscience Australia) 2023
Resource constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
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Australian Government Security Classification System
Associated resource
- Association Type
- Cross reference
- Title
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The 2023 National Seismic Hazard Assessment for Australia. Model Overview
- Citation identifier
- 148969
- Citation identifier
- 86d9ffcf-8bbf-4aad-b6c4-70fcae2be457
Associated resource
- Association Type
- Cross reference
- Title
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The 2023 National Seismic Hazard Assessment for Australia. Model Input and Output Data
- Citation identifier
- 149177
- Citation identifier
- 498d8c20-cb85-4558-956e-37aeb75c56a9
Associated resource
- Association Type
- Cross reference
- Title
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The 2023 National Seismic Hazard Assessment for Australia: notes on fault parametrisation for the Fault Source Model
- Citation identifier
- 149143
- Citation identifier
- 76fef341-dcb8-42c7-9691-ff73ced58fd4
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
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Link to Conference Page
Link to Conference Page
- Distribution format
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- OnLine resource
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Link to Paper
Link to Paper
- Distribution format
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Resource lineage
- Statement
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<div>Final conference paper available online here: https://aees.org.au/wp-content/uploads/2023/11/8.-Jonathan-Griffin.pdf</div>
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/59b94057-3b2f-4ca1-8724-8affeb351bf3
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Griffin, J.
Internal Contact
Type of resource
- Resource scope
- Document
- Name
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Journal Article / Conference Paper
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/148939
- Date info (Creation)
- 2023-12-18T06:44:28
- Date info (Revision)
- 2023-12-18T06:44:28
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- http://pid.geoscience.gov.au/dataset/ga/122551