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Coarse-fine Modeling and Efficiency Improvements in Earthquake Simulation

Summary: Coarse-fine Modeling and Efficiency
Improvements in Earthquake Simulation
Lu Xiao, Liu Yi, Harel Jonathan, Whitehead Katheryn
California Institute of Technology
Frontiers in Control & Dynamical Systems
Abstract. Computer simulations of the trajectories and slip velocities of geological faults during
seismological events are currently of great scientific interest. In this study, we seek to improve
upon existing earthquake simulation techniques. We begin with boundary integral methods
(BIMs), described by Day, et al.i
, which we will employ to evolve earthquake models on a "fine
scale". These BIMs are computationally expensive and scale unfavorably. For instance,
whereas models in two spatial dimensions can be feasibly carried out on top-of-the-line
workstations using these methods, extension into three dimensions is relatively impracticable.
We borrow ideas from "coarse-fine" ii, iii
analysis as we apply various techniques developed
specifically for our problem. We will discuss, in addition to multi-scale modeling, discretization
and data compression as techniques to improve memory efficiency.
It is widely hoped that a deepened understanding of earthquake physics may ultimately make
possible seismic hazard analysis, and potentially reduce material losses resulting from


Source: Adolphs, Ralph - Psychology and Neuroscience, California Institute of Technology


Collections: Biology and Medicine