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West Coast tides during Cascadia Subduction Zone tsunamis
Author(s) -
Mofjeld Harold O.,
Foreman Michael G. G.,
Ruffman Alan
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl02060
Subject(s) - geology , subduction , oceanography , seismology , west coast , spring (device) , range (aeronautics) , tectonics , mechanical engineering , materials science , engineering , composite material
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.