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Earthquake Risk in Australia

Created 16/10/2025

Updated 16/10/2025

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Earthquake risk maps of Australia were prepared using a computer program which selected events from a regional earthquake file and calculated maximum values of acceleration, velocity and intensity at the nodes of a half degree grid, using a scaling rule of the Kanai form Y = aebmR-c. The parameters a, b and c determined by Esteva and Rosenblueth for the Western United States of America were used. For each node on the grid the Y values were plotted against the return period (years) on logarithmic scales. The results, which were compiled from the period 1960-1972, were extrapolated to give expected values of ground acceleration, ground velocity and intensity for a fifty-year return period. These values were plotted and contoured at the following zone boundaries: [see pdf for details]. The following nine Zone-2 areas together with the maximum expected ground accelerations for a fifty-year return period were delineated: Meckering (12m/s2); Gippsland (5m/s2); Picton (4.9m/s2); Cape Otway (4.5m/s 2); Broome (4.2m/s 2); Lower Eyre Peninsula (3.8m/s2, excludes Port Lincoln); east of Carnarvon (3.2m/s2), and the Simpson Desert (4.0m/s2).

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Additional Info

Field Value
Title Earthquake Risk in Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/901fc87c-a1d8-4198-9d68-7580df217c78
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        110.0,
        -44.0
      ],
      [
        156.0,
        -44.0
      ],
      [
        156.0,
        -9.0
      ],
      [
        110.0,
        -9.0
      ],
      [
        110.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Earthquake Risk in Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/earthquake-risk-in-australia