[Faculty] Fwd: [CSRC-SDSU COLLOQUIUM]: Stable, High Order Accurate Adaptive Schemes for Studying the Earthquake Cycle

[Jose Castillo]

DATE: Friday, October 4th, 2013

TITLE: Stable, High Order Accurate Adaptive Schemes for Studying the
Earthquake Cycle

TIME: 3:30 PM
LOCATION: GMCS 214

SPEAKER: Brittany Erickson. Dept. of Geological Sciences at San Diego State
University

Many geophysical phenomena are characterized by properties that evolve over
a wide range of scales which introduce difficulties when attempting to
model these features in one computational method. I will discuss two
techniques for handling the varying time scales in earthquake cycle
modeling where extremely long inter-seismic periods are interspersed with
abrupt, short periods of dynamic rupture. The first technique is our
development of a high-order finite difference method for the elastic wave
equation that is able to efficiently handle varying temporal scales in a
single, stand-alone framework. Through the use of summation-by-parts (SBP)
operators and weak enforcement of boundary conditions we derive a provably
stable discretization. Time stepping is achieved through an implicit method
which allows us to take large time steps during the intermittent period
between earthquakes and adapts appropriately to fully resolve rupture. The
second technique to handle the varying time scales in earthquake cycle
modeling is neglect inertia and apply an explicit time-stepping method. For
this framework we have developed an efficient time-stepping method to solve
the equations of static-elasticity with time-dependent boundary conditions
that reflect slow, tectonic loading. We apply this method to understand how
sedimentary basins, similar to those found in Southern California, affect
the earthquake cycle.

HOST: Dr. Jose Castillo

For future events, please visit our website at:

http://www.csrc.sdsu.edu/colloquium.html



-- 

Jose E. Castillo  Ph.D.

Director / Professor

Computational Science Research Center

5500 Campanile Dr

San Diego State University

San Diego CA 92182-1245

619 5947205/3430, Fax 619-594-2459

 http://www.csrc.sdsu.edu/mimetic-book/

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