Tsunami data assimilation of Cascadia seafloor pressure gauge records from the 2012 Haida Gwaii earthquake

Aditya Riadi Gusman, Anne F. Sheehan, Kenji Satake, Mohammad Heidarzadeh, Iyan Eka Mulia, Takuto Maeda

Research output: Contribution to journalArticlepeer-review

53 Citations (SciVal)

Abstract

We use tsunami waveforms recorded on a dense array of seafloor pressure gauges offshore Oregon and California from the 2012 Haida Gwaii, Canada, earthquake to simulate the performance of two different real-time tsunami-forecasting methods. In the first method, the tsunami source is first estimated by inversion of recorded tsunami waveforms. In the second method, the array data are assimilated to reproduce tsunami wavefields. These estimates can be used for forecasting tsunami on the coast. The dense seafloor array provides critical data for both methods to produce timeliness (>30 min lead time) and accuracy in both timing and amplitude (>94% confidence) tsunami forecasts. Real-time tsunami data on dense arrays and data assimilation can be tested as a possible new generation tsunami warning system.

Original languageEnglish
Pages (from-to)4189-4196
Number of pages8
JournalGeophysical Research Letters
Volume43
Issue number9
DOIs
Publication statusPublished - 16 May 2016

Bibliographical note

Publisher Copyright:
© 2016. American Geophysical Union. All Rights Reserved.

Keywords

  • Cascadia subduction zone
  • dense pressure gauges array
  • fault slip distribution
  • the 2012 Haida Gwaii earthquake
  • tsunami data assimilation
  • tsunami forecast

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences

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