West Coast tides during Cascadia subduction zone tsunamis

Details West Coast tides during Cascadia subduction zone tsunamis West Coast tides during Cascadia subduction zone tsunamis

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2215m&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 17, p. 2215-2218

Physics

2

Oceanography: Physical: Tsunamis And Storm Surges, Oceanography: Physical: Surface Waves And Tides, Seismology: Paleoseismology, Information Related To Geographic Region: Pacific Ocean

Scientific paper

Low, neap tides occurred along the West Coast of the United States and Canada around 0500 UT January 27, 1700, a time for the last major Cascadia earthquake/tsunami based on teletsunami arrival times in Japan [Satake et al., 1996]. However, high-range perigean spring tides occurred only a week later, illustrating how accurately occurrence times must be known to constrain the region's background water levels during such events. The ranges of background water levels increase northward from 3 m at Monterey to 8.5 m at Queen Charlotte, as estimated from the amplitudes of perigean spring tides and subtidal winter fluctuations.

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