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Towards a homogeneous earthquake catalogue for Australia

Created 17/10/2025

Updated 17/10/2025

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An earthquake catalogue based on the moment magnitude scale is required for calculation of seismic hazard in Australia. However, the estimation of moment magnitudes for small to moderate sized earthquakes is not a routine process at seismic observatories, resulting in a catalogue mainly based on the local magnitude scale for Australia. In this study we explore the application of an automated procedure to estimate moment magnitudes by minimizing the misfit between observed and synthetic displacement spectra. We compile a reference catalogue of 15 earthquakes with moment magnitude values between 3.8 and 5.4 which were based on previous studies. The moment magnitudes were then recalculated and we find that the estimated moment magnitudes are in good agreement with reference values with differences mainly lower than 0.2. However, the reported local magnitudes of the selected events are consistently higher than the reference values with differences between 0.3 and 1.0. The automated procedure will be applied to compute moment magnitudes of the well recorded events in Australia, and to derive a scaling relation between local magnitude and moment magnitude. This abstract was submitted and presented to the 2016 Australian Earthquake Engineering Society Conference (AEES) ( https://aees.org.au/aees-asian-seismological-commission-conferences/)

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Additional Info

Field Value
Title Towards a homogeneous earthquake catalogue for Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/db41e240-fef7-4d43-b19d-d046b91d80b5
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 21/05/2016
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.92,
        -54.75
      ],
      [
        159.11,
        -54.75
      ],
      [
        159.11,
        -9.2402
      ],
      [
        112.92,
        -9.2402
      ],
      [
        112.92,
        -54.75
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Towards a homogeneous earthquake catalogue for Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/towards-a-homogeneous-earthquake-catalogue-for-australia