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Tongatapu probabilistic tsunami hazard assessment

Created 16/10/2025

Updated 16/10/2025

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A probabilistic tsunami hazard assessement (PTHA) was developed for the island of Tongatapu, All modelled tsunamis were initiated by hypothetical thrust earthquakes on the nearby Kermadec-Tonga subduction zone. We provide raster outputs containing the inundation depth with an estimated 10% and 2% chance of being exceeded in 50 years, as well as the code used to perform the analysis [both available here: https://github.com/GeoscienceAustralia/ptha/tree/master/misc/probabilistic_inundation_tonga2020].

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Additional Info

Field Value
Title Tongatapu probabilistic tsunami hazard assessment
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/b3e2f2b5-27fc-4020-a927-e2da3f2b31ae
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        184.5,
        -21.31
      ],
      [
        185.2,
        -21.31
      ],
      [
        185.2,
        -20.93
      ],
      [
        184.5,
        -20.93
      ],
      [
        184.5,
        -21.31
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Tongatapu probabilistic tsunami hazard assessment". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/tongatapu-probabilistic-tsunami-hazard-assessment