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A new local magnitude scale for southeastern Australia

Created 17/10/2025

Updated 17/10/2025

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Measurements of maximum trace amplitudes from 181 short- period vertical seismograms recorded at hypocentral distances of 3-1500 km from 36 earthquakes in the magnitude range 0.8 - 4.3 were used to derive a new preliminary ML scale for southeastern Australia ML = log A + (1.34±0.09)log(R/100) + (0.00055±0.00012)(R-100) + 3.13 + S where ML is local magnitude, A (mm) is equivalent Wood-Anderson trace amplitude not corrected for the measurement having been made on a vertical component, R (km) the hypocentral distance and S the station correction.

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Additional Info

Field Value
Title A new local magnitude scale for southeastern Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/c183ebaa-bb43-4e1b-8e1c-28f7fb718f7f
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        138.0,
        -44.0
      ],
      [
        158.0,
        -44.0
      ],
      [
        158.0,
        -26.0
      ],
      [
        138.0,
        -26.0
      ],
      [
        138.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "A new local magnitude scale for southeastern Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/a-new-local-magnitude-scale-for-southeastern-australia