Multi-Data-Type Source Estimation for the 1992 Flores Earthquake and Tsunami

  • Ignatius Ryan PranantyoEmail author
  • Phil R. Cummins


We revisit the source of the 1992 Flores earthquake and tsunami using finite-fault inversion. We simultaneously invert teleseismic body and surface waves together with coseismic uplift/subsidence datasets. We then verify the inverted source against tsunami run-up heights along the northern coast of Flores Island and the only tide gauge recording of the tsunami. Our preferred source model provides a good fit to all the datasets, whereas previous models only explained a subset of the available data. We show that the fault geometry implies segmentation of the back-arc thrust system in the eastern Sunda Arc.


Flores Island tsunami 1992 finite-fault source inversion tsunami hazard seismic hazard 



This work was partly supported by the Government of Australia’s Australian Awards Scholarship program. The high-resolution digital elevation model around Flores Island was provided by the Australia–Indonesia Facility for Disaster Reduction (AIFDR), which was supported by the Australian Department of Foreign Affairs and Trade’s Australian Aid program. The tsunami numerical simulation was undertaken with the assistance of resources and services from the National Computational Infrastructure (NCI), which is supported by the Australian Government. We also thank two reviewers, who provided rigorous comments on the paper.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Research School of Earth SciencesThe Australian National UniversityCanberraAustralia

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