Program and Agenda

Abstract

NEAR FIELD AND FAR-FIELD MODELING OF THE 28 OCTOBER 2012 HAIDA GWAII TSUNAMI

On October 28, 2012, a strong (Mw=7.7) earthquake occurred offshore of Moresby Island, Haida Gwaii (formerly the Queen Charlotte Islands). The earthquake generated a trans-Pacific tsunami observed from New Zealand to Alaska. We used an updated finite-fault model of the earthquake of Hayes (2013) to estimate the tsunami source. The location of this source was subsequently adjusted using tsunami waveforms recorded by bottom pressure recorders at NOAA DART stations and on the NEPTUNE Canada cabled observatory. The adjusted source was then used in a high-resolution model of tsunami wave propagation towards the bays and inlets of Moresby Island. According to the model, tsunami run-up in some bays would have been higher than 7 m. Subsequent post-surveys at several Moresby Island sites were undertaken in mid-November of 2012 and in June 2013, directed in part by the numerical model results. These surveys showed clear evidence of recent tsunami run-up of more than 8 m above the tide at specific coastal embayments, in good agreement with the numerical model results.

ePoster:

Authors

Fine, I. V., Institute of Ocean Sciences, Canada, ifine54@gmail.com

Cherniawsky, J. Y., Institute of Ocean Sciences, Canada, Josef.Cherniawsky@dfo-mpo.gc.ca

Thomson, R. E., Institute of Ocean Sciences, Canada, Richard.Thomson@dfo-mpo.gc.ca

Details

Poster presentation

Session #:086
Date: 2/27/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 1879