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#3d earthquake project verification
He has been involved in projects such as broadband simulation of ground motion from large earthquakes 3-D modelling of strong ground motion from M 7.0 earthquakes on the Salt Lake City Segment of the Wasatch Fault, Utah forward and inverse modelling of rupture dynamics in three dimensions and verification and validation of numerical simulation methods. His research interests include 3-D simulation of wave propagation using finite differences, strong ground motion and site amplification, earthquake dynamics, non-linear effects in strong ground motion, and parallel and high-performance computing. Kim Olsen is a professor at the Department of Geological Sciences of San Diego State University. If you want to learn more about this, join us for an afternoon of cutting edge earthquake science discussions at our upcoming WRN Seminar on Seismic Risk, on February 23rd.
Counteracting these amplification mechanisms, nonlinear effects can significantly reduce peak ground motions for large scenario earthquakes.
The strong localized amplification effects from the wave guide are highly sensitive to the details of the 3D velocity model used in the simulations.
For example, wave-guide channeling effects can generate 10-fold differences in long-period peak ground motions dependent on the epicentral location. Path effects can amplify the ground motions significantly, demanding high accuracy of the underlying crustal model. These help determine the amount of shaking that could occur in an area. Recent large-scale 3D modeling exercises using physics-based simulations have provided useful insight into the factors that control the ground-motion levels for large earthquakes. San Diego State University professor and seismologist Kim Olsen and colleagues have created a computer-generated model of this monster quake in order to project its capacity for destruction. But even those mighty temblors would pale next to “the big one,” the moniker for a magnitude 7.5 or greater quake on the San Andreas Fault. An even larger quake – of 7.0 magnitude – is 94% certain. Seismologists predict that it is very likely that California will experience an earthquake measuring 6.7 on the Richter scale during the next 30 years.