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The 2018 National Seismic Hazard Assessment for Australia: Earthquake Epicentre Catalogue

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Created 13/01/2025

Updated 13/01/2025

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The 2018 National Seismic Hazard Assessment (NSHA18) is a flagship Geoscience Australia product, used to support the decisions of the Australian Building Codes Board and Standards Australia to ensure buildings and infrastructure are built to withstand seismic events in Australia. It is also important for the insurance sector and provides a baseline for setting national reinsurance premiumsguides the level of reinsurance premiums. The National Seismic Hazard Assessment Earthquake Epicentre Catalogue (NSHA18-Cat) of historical earthquakes is the authoritative catalogue underpinning the NSHA18. The NSHA18-Cat is compiled from Australian and international sources and combines the highest quality epicentres and magnitudes for the assessment of earthquake hazard in Australia. For the first time in an Australian national seismic hazard assessment, earthquake magnitudes are uniformly expressed in the moment magnitude MW scale, using Australian-specific magnitude conversion equations appropriate for several common magnitude types. The magnitude harmonisation represents a significant advance in our ability to represent earthquake hazard in a uniform manner throughout the country.
Key points and advances on the NSHA18-Cat include:

The addition of almost three decades worth of additional earthquake data gathered by seismic networks across the Australian continent, relative to hazard assessments from the early 1990s.

The use of the International Seismological Centre-Global Earthquake Model Catalogue (Version 5) for regional plate boundary source zones;

An improved methodology for revising local magnitudes due to the historical use of inappropriate magnitude attenuation formulae using a consistent and objective methodology;

The development of conversion equations from original magnitude types to MW specific for the Australian earthquake catalogue. This ensures consistency between rates of earthquake recurrence and ground-motion models in hazard calculations;

The development of new magnitude completeness models in terms of MW.

The combination of these new data and advances demonstrates global best practice and evidence based science for undertaking national-scale earthquake hazard assessments. The earthquake epicentre solutions are provided in simple comma separated value and shapefile formats and are attached to this report.

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Field Value
Title The 2018 National Seismic Hazard Assessment for Australia: Earthquake Epicentre Catalogue
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/43b38068-f9f7-4651-83f8-cc445f7be3ca
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 04/05/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[112.0, -44.0], [154.0, -44.0], [154.0, -9.0], [112.0, -9.0], [112.0, -44.0]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "The 2018 National Seismic Hazard Assessment for Australia: Earthquake Epicentre Catalogue". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/the-2018-national-seismic-hazard-assessment-for-australia-earthquake-epicentre-catalogue

Original dataset
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No duplicate datasets found.