Physics
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3812605y&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 12, CiteID L12605
Physics
2
Natural Hazards: Disaster Risk Analysis And Assessment (6304, 8488), Oceanography: Physical: Hydrodynamic Modeling, Oceanography: Physical: Topographic/Bathymetric Interactions, Oceanography: Physical: Tsunamis And Storm Surges (4302, 4304)
Scientific paper
The 2010 Chile earthquake of Mw 8.8 generated a destructive tsunami in the near field that resulted in warnings across the Pacific. Numerical modeling shows trapping and amplification of the energy over the continental shelf and slope. A spectral analysis of the computed surface elevation reveals resonance oscillations with periods up to 129 min along the central Chile coast. The temporal and spectral data provides an explanation for the long-period waves recorded by DART buoys and the prolonged wave activities and belated impacts reported by residents and survey teams. The present study of the 2010 Chile tsunami together with those of the 2006 Kuril and 2009 Samoa tsunamis has directly associated shelf resonance with impacts on insular and continental coasts and provided a tool to identify at-risk localities in tsunami hazard assessment.
Cheung Kwok Fai
Yamazaki Yoshiki
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