Marine Geophysical Research

, Volume 35, Issue 3, pp 319–325 | Cite as

Near-field tsunami amplification factors in the Kii Peninsula, Japan for Dense Oceanfloor Network for Earthquakes and Tsunamis (DONET)

  • Toshitaka Baba
  • Narumi Takahashi
  • Yoshiyuki Kaneda
Special Issue Paper

Abstract

We investigated the correlation between coastal and offshore tsunami heights by using data from the Dense Oceanfloor Network for Earthquakes and Tsunamis (DONET) observational array of ocean-bottom pressure gauges in the Nankai trough off the Kii Peninsula, Japan. For near-field earthquakes, hydrostatic pressure changes may not accurately indicate sea surface fluctuations, because ocean-bottom pressure gauges are simultaneously displaced by crustal deformation due to faulting. To avoid this problem, we focused on the average waveform of the absolute value of the hydrostatic pressure changes recorded at all the DONET stations during a tsunami. We conducted a Monte Carlo tsunami simulation that revealed a clear relationship between the average waveforms of DONET and tsunami heights at the coast. This result indicates the possibility of accurate real-time prediction of tsunamis by use of arrays of ocean-bottom pressure gauges.

Keywords

Tsunami early prediction Cabled seafloor observatory DONET Nankai trough 

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Toshitaka Baba
    • 1
  • Narumi Takahashi
    • 1
  • Yoshiyuki Kaneda
    • 1
  1. 1.Yokohama Institute for Earth SciencesJapan Agency for Marine-Earth Science and Technology (JAMSTEC)YokohamaJapan

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