Modeling the Effects of Source and Path Heterogeneity on Ground Motions of Great Earthquakes on the Cascadia Subduction Zone Using 3D Simulations

2014 ◽  
Vol 104 (3) ◽  
pp. 1430-1446 ◽  
Author(s):  
A. A. Delorey ◽  
A. D. Frankel ◽  
P. Liu ◽  
W. J. Stephenson
Keyword(s):  
Subduction Zone ◽  
Ground Motions ◽  
Cascadia Subduction Zone ◽  
3D Simulations ◽  
Great Earthquakes

Simulation of Tsunamis from Great Earthquakes on the Cascadia Subduction Zone

Science ◽  
1990 ◽  
Vol 250 (4985) ◽  
pp. 1248-1251 ◽  
Author(s):  
M. K.-F. Ng ◽  
P. H. Leblond ◽  
T. S. Murty
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Great Earthquakes

Confidence levels for tsunami-inundation limits in northern Oregon inferred from a 10,000-year history of great earthquakes at the Cascadia subduction zone

2009 ◽  
Vol 54 (1) ◽  
pp. 27-73 ◽  
Author(s):  
George R. Priest ◽  
Chris Goldfinger ◽  
Kelin Wang ◽  
Robert C. Witter ◽  
Yinglong Zhang ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Tsunami Inundation ◽  
Confidence Levels ◽  
Great Earthquakes ◽  
History Of

Development of design spectra for long-duration ground motions from Cascadia subduction earthquakes

1998 ◽  
Vol 25 (6) ◽  
pp. 1078-1090 ◽  
Author(s):  
R Tremblay
Keyword(s):  
Subduction Zone ◽  
Failure Modes ◽  
Ground Motions ◽  
Damage Index ◽  
Cascadia Subduction Zone ◽  
Damage Potential ◽  
Design Spectra ◽  
Subduction Earthquakes ◽  
Long Duration ◽  
Short Period

There is now growing evidence that large-magnitude earthquakes have occurred and could occur again along the Cascadia subduction zone located west of Vancouver Island, Bristish Columbia. Numerical simulations indicate that these earthquakes would produce long-duration ground motions and would thus be capable of inducing a large number of reversals of inelastic deformations in engineered structures. Efforts have now been undertaken to account for this damage potential in building codes. In this paper, inelastic design spectra are developed for Cascadia subduction earthquakes for four sites in British Columbia. These spectra are compared with elastic design spectra that have been developed recently for the same sites based on empirical attenuation relationships for Cascadia events. The approach used to develop the inelastic spectra aims at providing the same level of protection against structural failure for both subduction events and crustal or subcrustal earthquakes. Force modification factors are first determined for structures exhibiting various failure modes and ductility levels when subjected to representative crustal and subcrustal earthquake ground motions. Thereafter, design spectra are developed for the same structures to prevent structural collapse under simulated Cascadia subduction ground motions. The study reveals that the elastic spectra do not reflect adequately the damage potential of Cascadia earthquakes. These elastic spectra generally are unconservative for Tofino and Victoria. For Vancouver and Prince George, the elastic spectra overestimate the demand, especially for short-period structures.Key words: collapse, crustal earthquakes, damage index, design spectrum, ductility, duration, ground motion, subduction zone.

Tsunami history of an Oregon coastal lake reveals a 4600 yr record of great earthquakes on the Cascadia subduction zone

2005 ◽  
Vol 117 (7) ◽  
pp. 1009 ◽  
Author(s):  
Harvey M. Kelsey ◽  
Alan R. Nelson ◽  
Eileen Hemphill-Haley ◽  
Robert C. Witter
Keyword(s):  
Subduction Zone ◽  
Cascadia Subduction Zone ◽  
Coastal Lake ◽  
Great Earthquakes ◽  
History Of
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