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TitleGround shaking from the Chile Earthquake: applications to Cascadia
AuthorVentura, C; Cassidy, J
Source9th US National and 10th Canadian Conference on Earthquake Engineering, abstracts; 2010 p. 1
Alt SeriesEarth Sciences Sector, Contribution Series 20100089
Meeting9th US National and 10th Canadian Conference on Earthquake Engineering; Toronto; CA; July 25-29, 2010
Mediaon-line; digital
File formathtml
ProvinceWestern offshore region
AreaCascadia; Chile; Canada
Subjectsgeophysics; engineering geology; earthquakes; earthquake studies; earthquake risk; subduction; subduction zones; tsunami; building codes; Nazca plate; South American plate
ProgramTargeted Hazard Assessments in Western Canada, Public Safety Geoscience
LinksOnline - En ligne
AbstractThe 2010 Chile earthquake provides a rare opportunity to compare strong shaking observations with damage patterns. This subduction earthquake was caused by up to 13 m of eastward slip of the Nazca plate beneath the South American plate. The rupture zone extended nearly 600 km along the Chile coast and covered the most populated region of the country — extending from south of Concepcion to just south of Valpraiso (near the latitude of Santiago). A devastating tsunami was generated that impacted the coast of Chile and also extended across the Pacific Ocean. As this is the type of earthquake that is expected along the Cascadia subduction zone of western Canada and the U.S., and given that modern building codes and construction styles in Chile and Cascadia are very similar, the Canadian Association of Earthquake Engineers sent a team of 10 engineers and a seismologist to the earthquake zone to learn from this earthquake. This presentation will focus on sites where strong ground shaking was recorded (the data available to date range from about 0.1g to 0.66g). The general characteristics of the ground motions obtained in the region will be discussed and salient features of the records will be presented. Examples of the damage observed in the vicinity of the strong motion recordings will be presented and discussed. The relevance of this set of ground motions to the Pacific Northwest will be highlighted.