Product catalogue
A Far-Field Ground-Motion Model for Northern Australia from Plate Margin Earthquakes
At its nearest, northern Australia is just over 400 km from an active convergent plate margin. This complex and unique tectonic region combines active subduction and the collision of the Sunda-Banda Arc with the Precambrian North Australian Craton (NAC) near the Timor Trough and continues through to the New Guinea Highlands. Ground-motions generated from earthquakes on these structures have particular significance for northern Australian communities and infrastructure projects, with several large earthquakes in the Banda Arc region having caused ground-shaking-related damage in the northern Australian city of Darwin over the historical period.
There are very few, if any, present-day tectonic analogs where cold cratonic crust abuts a convergent tectonic margin with subduction and continent-continent collision. Ground motions recorded from earthquakes in typical subduction environments are highly attenuated as they travel through young sediments associated with forearc accretionary prisms and volcanic back-arc regions. In contrast, seismic energy from earthquakes in the northern Australian plate margin region are efficiently channelled through the low-attenuation NAC, which acts as a waveguide for high-frequency earthquake shaking. As such, it is difficult to select models appropriate to the region for seismic hazard assessments.
The development of a far-field ground-motion model to support future seismic hazard assessments for northern Australia is discussed. In general, the new model predicts larger ground motions in Australia from plate margin sources than models used for the 2018 National Seismic Hazard Assessment of Australia, none of which were considered fully appropriate for the tectonic environment. Short-period ground motions are strongly dependent on hypocentral depth and are significantly higher than predictions from commonly-used intraslab ground-motion models at comparable distances. The depth dependence in ground motion diminishes with increasing spectra periods.
<b>Cite this article as</b> Allen, T. I. (2021). A Far-Field Ground-Motion Model for the North Australian Craton from Plate-Margin Earthquakes, <i>Bull. Seismol. Soc. Am. </i><b> 112</b>, 1041–1059, doi: 10.1785/0120210191
Simple
Identification info
- Date (Creation)
- 2020-01
- Date (Publication)
- 2022-11-10T06:29:32
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/133037
Identifier
- Codespace
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Digital Obejct Identifier
- Cited responsible party
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Role Organisation / Individual Name Details Author Allen, T.
Place and Communities Internal Contact Publisher Seismological Society of America
External Contact
- Name
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Bulletin of Earthquake Engineering
- Issue identification
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(2022) Volume 112 Number 2
- Page
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1041-1059
- Purpose
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This article was written for Submission to the "Bulletin of the Seismological Society of America" journal 2021
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Allen, T.
Place and Communities Internal Contact Resource provider Place and Communities Division
External Contact
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- Topic category
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- Geoscientific information
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))
- Maintenance and update frequency
- Not planned
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- 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
- theme.ANZRC Fields of Research.rdf
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Natural Hazards
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Seismology and Seismic Exploration
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EARTH SCIENCES
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Earthquake Engineering
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- Theme
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Ground-motion attenuation
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- Discipline
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Earthquake Hazard
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- Theme
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North Australian Craton
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- Theme
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Banda Sea
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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
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4.0
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- License
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- License
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
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- OnLine resource
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Link to Journal Article
Link to Journal Article
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Resource lineage
- Statement
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This article was written and submitted to the "Bulletin of the Seismological Society of America" journal in 2021, Published in 2022.
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/ba0c4b00-7e64-4253-9881-9ed9d1fe7871
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GeoNetwork UUID
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- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Owner Allen, T.
Place and Communities Internal Contact Point of contact Allen, T.
Place and Communities Internal Contact
Type of resource
- Resource scope
- Document
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Journal Articles and Conference Papers
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/133037
- Date info (Creation)
- 2020-01-07T04:47:54
- Date info (Revision)
- 2020-01-07T04:47:54
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
- https://pid.geoscience.gov.au/dataset/ga/133037