The 2018 National Seismic Hazard Assessment for Australia

Geoscience Australia, together with contributors from the wider Australian seismology community, has produced a National Seismic Hazard Assessment (NSHA18) that is intended as an update to the 2012 National Seismic Hazard Maps (NSHM12; Burbidge, 2012; Leonard et al., 2013). This Geoscience Australia Record provides an overview of the development of the NSHA18. Time-independent, mean seismic design values are calculated on Standards Australia’s AS1170.4 Soil Class Be (at VS30=760 m/s) for the horizontal peak ground acceleration (PGA) and for the geometric mean of the spectral accelerations, Sa(T), for T = 0.1, 0.2, 0.3, 0.5, 1.0, 2.0 and 4.0 s over a 15-km national grid spacing. Hazard curves and uniform hazard spectra are also calculated for key localities. Maps of PGA, in addition to Sa(0.2 s) and Sa(1.0 s) and for a 10% probability of exceedance in 50 years (Figure A). Additional maps and seismic hazard products are provided in a separate Geoscience Australia Record (Allen, 2018).

The NSHA18 update yields many important advances over its predecessors, including:

- the calculation in a full probabilistic framework (Cornell, 1968) using the Global Earthquake Model Foundation’s OpenQuake-engine (Pagani et al., 2014);

- the consistent expression of earthquake magnitudes in terms of moment magnitude, MW;

- inclusion of a national fault-source model based on the Australian Neotectonic Features database (Clark et al., 2016);

- the inclusion of epistemic (i.e. modelling) uncertainty:

- through the use of multiple alternative source models;

- on magnitude-recurrence distributions;

- fault recurrence and clustering models;

- on maximum earthquake magnitudes for both fault and area sources through an expert elicitation workshop; and

- the use of modern ground-motion models, capturing the epistemic uncertainty on ground motion through an expert elicitation workshop.

Identification info

Date (Creation): 2018-10-05T00:00:00

Date (Publication): 2018-10-08T22:46:34

Date (Revision): 2018-11-05T09:26:25

Date (Revision): 2019-04-09T01:08:53

Citation identifier: Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/123370

Cited responsible party

Role	Organisation / Individual Name	Details
Author	Allen, T.

Purpose: This is the collection level record describes all components (reports and data) of the NSHA18 product.

Status: Completed

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Role	Organisation / Individual Name	Details
Point of contact	Allen, T.
Resource provider	Positioning and Community Safety Division
Point of contact	Commonwealth of Australia (Geoscience Australia)	Voice

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Geoscientific information

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Maintenance and update frequency: As needed

Keywords

HVC_144647

Discipline

earthquake hazard

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Published_External

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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

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Role	Organisation / Individual Name	Details
Distributor	Commonwealth of Australia (Geoscience Australia)	Voice

OnLine resource: 10% in 50 year seismic hazard map

10% in 50 year seismic hazard map

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

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

OnLine resource: NSHA18 catalogue

NSHA18 catalogue

OnLine resource: Expert elicitation of model parameters for the 2018 National Seismic Hazard Assessment - Summary of workshop, methodology and outcomes

Expert elicitation of model parameters for the 2018 National Seismic Hazard Assessment - Summary of workshop, methodology and outcomes

OnLine resource: Selection and ranking of ground-motion models for the 2018 National Seismic Hazard Assessment of Australia

Selection and ranking of ground-motion models for the 2018 National Seismic Hazard Assessment of Australia

OnLine resource: The 2018 National Seismic Hazard Assessment for Australia – earthquake epicentre catalogue

The 2018 National Seismic Hazard Assessment for Australia – earthquake epicentre catalogue

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

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

OnLine resource: The 2018 National Seismic Hazard Assessment for Australia – Data

The 2018 National Seismic Hazard Assessment for Australia – Data

OnLine resource: The 2018 National Seismic Hazard Assessment for Australia – Data package, maps and grid values

The 2018 National Seismic Hazard Assessment for Australia – Data package, maps and grid values

OnLine resource: The 2018 National Seismic Hazard Assessment: Model overview

The 2018 National Seismic Hazard Assessment: Model overview

OnLine resource: The 2018 National Seismic Hazard Assessment for Australia – model input files

The 2018 National Seismic Hazard Assessment for Australia – model input files

Resource lineage

Statement: www.ga.gov.au/nsha

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/edcf5aab-0be9-45d4-ac25-e1410f357b68

Title: GeoNetwork UUID

Language: English

Character encoding: UTF8

Contact

Role	Organisation / Individual Name	Details
Point of contact	Allen, T. Commonwealth of Australia (Geoscience Australia)	Voice

Role

Organisation / Individual Name

Details

Point of contact

Allen, T.

Commonwealth of Australia (Geoscience Australia)

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Type of resource

Resource scope: Document

Name: GA publication: Collection

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier: eCatId/123370

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/edcf5aab-0be9-45d4-ac25-e1410f357b68

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

Edition date: 2015-07-01T00:00:00

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

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