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Study on potential tsunami by earthquake in subduction zone of Sulawesi Sea

  • Alfath Abu Bakar
  • Djati Mardiatno
  • Muh Aris MarfaiEmail author
Original Paper

Abstract

Indonesia is one country in the world featuring a complex tectonic structure. This condition makes earthquakes often occur in many areas of this country and as an earthquake rages beneath the sea, it will potentially trigger tsunami. One of the areas in Indonesia with a high seismic activity is Sulawesi region particularly in the Sulawesi Sea subduction zone, making it important to carry out a study on the potential tsunami at this location. The purpose of this study was to analyze the existing huge potential energy in Sulawesi Sea subduction zone and to identify tsunami modeling likely to occur based on the potential energy of the region. The approach used in assessing the tsunami disaster was the calculation of the potential energy of an earthquake and tsunami modeling based on the potential energy. The method used in this research was the least squares method for the calculation of potential energy, and near-field tsunami modeling with the assistance of TUNAMI-N2 COD. The research finding has shown that the Sulawesi Sea subduction zone has potential energy of 1.35469 × 1023 erg, equivalent to an earthquake with a magnitude of 7.6 Mw. The tsunami modeling made shown the average wave propagation reaching ashore within 12.3 min with a height varying between 0.1 and > 3 m. The tsunami modeling also indicated that there are seven sub-districts in Buol District, Central Sulawesi, which is affected by a significant tsunami.

Keywords

Earthquake Tsunami Potential energy TUNAMI 

Notes

Acknowledgements

The authors would like to thank to the Indonesian Agency for Meteorology, Climatology, and Geophysics and the Faculty of Geography Universitas Gadjah Mada that supported this research as part of second batch academic cooperation program began in 2015.

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Copyright information

© Saudi Society for Geosciences 2017

Authors and Affiliations

  • Alfath Abu Bakar
    • 1
  • Djati Mardiatno
    • 2
  • Muh Aris Marfai
    • 2
    Email author
  1. 1.Geophysics Station of KendariIndonesian Agency of Meteorology Climatology and GeophysicsKendariIndonesia
  2. 2.Faculty of GeographyUniversitas Gadjah MadaYogyakartaIndonesia

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