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Earthquake sources of the Australian plate margin: Revised models for the 2018 national tsunami and earthquake hazard assessments

Located within an intraplate setting, continental Australia has a relatively low rate of seismicity compared with its surrounding plate boundary regions. However, the plate boundaries to the north and east of Australia host significant earthquakes that can impact Australia. Large plate boundary earthquakes have historically generated damaging ground shaking in northern Australia, including Darwin. Large submarine earthquakes have historically generated tsunami impacting the coastline of Australia.


Previous studies of tsunami hazard in Australia have focussed on the threat from major subduction zones such as the Sunda and Kermadec Arcs. Although still subject to uncertainty, our understanding of the location, geometry and convergence rates of these subduction zones is established by global tectonic models. Conversely, actively deforming regions in central and eastern Indonesia, the Papua New Guinea region and the Macquarie Ridge region are less well defined, with deformation being more continuous and less easily partitioned onto discrete known structures. A number of recently published geological, geodetic and seismological studies are providing new insights into present-day active tectonics of these regions, providing a basis for updating earthquake source models for earthquake and tsunami hazard assessment.


This report details updates to earthquake source models in active tectonic regions along the Australian plate boundary, with a primary focus on regions to the north of Australia, and a subsidiary focus on the Puyesgur-Macquarie Ridge-Hjort plate boundary south of New Zealand. The motivation for updating these source models is threefold:

1. To update regional source models for the 2018 revision of the Australian probabilistic tsunami hazard assessment (PTHA18);

2. To update regional source models for the 2018 revision of the Australian national seismic hazard assessment (NSHA18); and

3. To provide an updated database of earthquake source models for tsunami hazard assessment in central and eastern Indonesia, in support of work funded through the Department of Foreign Affairs and Trade (DFAT) DMInnovation program.

Simple

Identification info

Date (Creation)
2018-09-18T00:00:00
Date (Publication)
2018-10-10T04:08:24
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/123048

Citation identifier
Digital Object Identifier/http://dx.doi.org/10.11636/Record.2018.031

Cited responsible party
Role Organisation / Individual Name Details
Author

Griffin, J.

Author

Davies, G.

Name

Record

Issue identification

2018/031

Purpose

This Record is the fifth in the series of Records and datasets that support the release of the NSHA18 (overarching overview provided at ecat 123020)

Status
Point of contact
Role Organisation / Individual Name Details
Point of contact

Griffin, J.

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Davies, G.

Commonwealth of Australia (Geoscience Australia)

Voice
Resource provider

Positioning and Community Safety Division

Commonwealth of Australia (Geoscience Australia)

Voice
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
As needed

Resource format

Title

Product data repository: Various Formats

Website

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

Discipline
  • earthquake hazard

Discipline
  • tsunami hazard

Product
  • Published_External

Keywords
  • HVC_144647

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice
OnLine resource

Download the Record (pdf)

Download the Record (pdf)

OnLine resource

Related product: Earthquake sources of the Australian plate margin: data for the 2018 national tsunami and earthquake hazard assessments

Related product: Earthquake sources of the Australian plate margin: data for the 2018 national tsunami and earthquake hazard assessments

OnLine resource

Related product: NSHA18 catalogue

Related product: NSHA18 catalogue

OnLine resource

The 2018 National Seismic Hazard Assessment for Australia

The 2018 National Seismic Hazard Assessment for Australia

Resource lineage

Statement

Not supplied

Hierarchy level
Document

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/ea06c973-163d-47bc-b332-f245163e103b

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Griffin, J.

Commonwealth of Australia (Geoscience Australia)

Voice

Type of resource

Resource scope
Document
Name

GA publication: Record

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/123048

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/ea06c973-163d-47bc-b332-f245163e103b

Date info (Creation)
2018-05-04T03:37:56
Date info (Revision)
2018-05-04T03:38:12

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

HVC_144647 Published_External earthquake hazard tsunami hazard

Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


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