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Assessing tsunami hazard using heterogeneous slip models in the Mentawai Islands, Indonesia

Created 16/10/2025

Updated 16/10/2025

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Tsunami hazard maps are generated for the Mentawai Islands, West Sumatra, Indonesia, to support evacuation and disaster response planning. A random heterogeneous slip generator is used to forward model a suite of earthquake rupture scenarios on the Mentawai Segment of the Sunda Subduction Zone. A total of 1000 rupture models that fit constraints provided by coral and geodetic records of coseismic vertical deformation from great earthquakes in 1797, 1833 and 2007 are used to model inundation and define a maximum inundation zone that envelopes all of these scenarios. Results are compared with single scenario hazard assessments developed by experts and agreed through scientific consensus building processes to assess the additional value of modelling a suite of scenarios to obtain a more robust estimate of potential inundated areas by incorporating uncertainty in the earthquake source. The model presented here, like all tsunami hazard assessments, is based on assumptions about the characteristics of future events based on past events, however by sampling a range of plausible outcomes we gain a more robust estimate of which areas may be inundated during a tsunami within the bounds of our assumptions.

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Field Value
Title Assessing tsunami hazard using heterogeneous slip models in the Mentawai Islands, Indonesia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/en/dataset/06152bce-0a6a-448c-b918-b655f91d9066
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 11/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Assessing tsunami hazard using heterogeneous slip models in the Mentawai Islands, Indonesia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/assessing-tsunami-hazard-using-heterogeneous-slip-models-in-the-mentawai-islands-indonesia