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Method of calculating tsunami travel times in the Andaman Sea region

Author

Listed:
  • Monte Kietpawpan
  • Parichart Visuthismajarn
  • Charlchai Tanavud
  • Mark Robson

Abstract

A new model to calculate tsunami travel times in the Andaman Sea region has been developed. The model specifically provides more accurate travel time estimates for tsunamis propagating to Patong Beach on the west coast of Phuket, Thailand. More generally, the model provides better understanding of the influence of the accuracy and resolution of bathymetry data on the accuracy of travel time calculations. The dynamic model is based on solitary wave theory, and a lookup function is used to perform bilinear interpolation of bathymetry along the ray trajectory. The model was calibrated and verified using data from an echosounder record, tsunami photographs, satellite altimetry records, and eyewitness accounts of the tsunami on 26 December 2004. Time differences for 12 representative targets in the Andaman Sea and the Indian Ocean regions were calculated. The model demonstrated satisfactory time differences (>2 min/h), despite the use of low resolution bathymetry (ETOPO2v2). To improve accuracy, the dynamics of wave elevation and a velocity correction term must be considered, particularly for calculations in the nearshore region. Copyright Springer Science+Business Media B.V. 2008

Suggested Citation

  • Monte Kietpawpan & Parichart Visuthismajarn & Charlchai Tanavud & Mark Robson, 2008. "Method of calculating tsunami travel times in the Andaman Sea region," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 46(1), pages 89-106, July.
    • Handle: RePEc:spr:nathaz:v:46:y:2008:i:1:p:89-106
    DOI: 10.1007/s11069-007-9183-5
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    References listed on IDEAS

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    1. Sudipto Banerjee, 2005. "On Geodetic Distance Computations in Spatial Modeling," Biometrics, The International Biometric Society, vol. 61(2), pages 617-625, June.
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    Cited by:

    1. Anita Grezio & Warner Marzocchi & Laura Sandri & Paolo Gasparini, 2010. "A Bayesian procedure for Probabilistic Tsunami Hazard Assessment," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 53(1), pages 159-174, April.

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