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The West Tasman Sea (Flinders Island) earthquake of 14 September 1946

Created 17/10/2025

Updated 17/10/2025

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The largest southeastern Australian earthquake this century occurred in the West Tasman Sea, 100 km east of Flinders Island, at 1948 UTC on 14 September 1946. Its epicentre was at 39.97°S, 149.35°E and its Richter magnitude ML 6.0. It was felt strongly throughout Tasmania and Gippsland, Victoria, and caused minor damage in Launceston. The isoseismal map of the earthquake is consistent with lower strong ground motion attenuation in Tasmania than in mainland southeastern Australia, and the macroseismic effects suggest amplification of seismic shaking by Tertiary lake sediments in Hobart and Launceston.

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Additional Info

Field Value
Title The West Tasman Sea (Flinders Island) earthquake of 14 September 1946
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/cfd386bc-ce61-4ebe-8b73-4f1bd7d2dfab
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        141.76,
        -44.23
      ],
      [
        150.99,
        -44.23
      ],
      [
        150.99,
        -36.73
      ],
      [
        141.76,
        -36.73
      ],
      [
        141.76,
        -44.23
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "The West Tasman Sea (Flinders Island) earthquake of 14 September 1946". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/the-west-tasman-sea-flinders-island-earthquake-of-14-september-1946