Impacts of the 2011 east Japan tsunami in the papua region, Indonesia: Field observation data and numerical analyses

Subandono Diposaptono, Abdul Muhari, Fumihiko Imamura, Shunichi Koshimura, Hideaki Yanagisawa

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    This paper presents post-tsunami survey results describing the impacts of the 2011 East Japan tsunami in Yos Sudarso Bay, Papua, Indonesia. Although the far-field tsunami had a height of 0.8 m measured at a tide gauge inside the small U-shaped bay, it severely damaged four villages scattered along the bay. Detailed numerical analysis was carried out to explain the damages. We used a well-verified source model in the near- and far-field cases to model the propagation of the tsunami southward in the Pacific until reaching Papua Island, Indonesia. The numerical analyses demonstrate two causes of damage in the bay: the maximum tsunami velocity (3.5 m s-1) floated the houses in the villages of Tobati and Enggros and caused them to collapse, and water trapped by the hook-shaped peninsula amplified the tsunami height at the Holtekamp and Hanurata.

    Original languageEnglish
    Pages (from-to)1625-1639
    Number of pages15
    JournalGeophysical Journal International
    Volume194
    Issue number3
    DOIs
    Publication statusPublished - 2013 Sep 1

    Keywords

    • Early warning
    • Earthquake source observations
    • Tsunamis

    ASJC Scopus subject areas

    • Geophysics
    • Geochemistry and Petrology

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