HR: 09:45h
AN: SF51A-08    [Abstracts]
TI: Application of GeoFEST With PYRAMID Mesh Refinement to Southern California Crustal Deformation
AU: * Parker, J
EM: Jay.W.Parker@jpl.nasa.gov
AF: Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Lyzenga, G
EM: Gregory.A.Lyzenga@jpl.nasa.gov
AF: Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Glasscoe, M
EM: Margaret.T.Glasscoe@jpl.nasa.gov
AF: Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Baker, T
EM: teresab@alum.mit.edu
AF: Massachusetts Institute of Technology, 77 massachusetts avenue, Cambridge, MA 02139
AU: Donnellan, A
EM: Andrea.Donnellan@jpl.nasa.gov
AF: Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AB: Modeling of southern California tectonics with its wide range of length scales, complex faulting pattern and variety of relevant material properties demands high-performance techniques with unprecedented flexibility. The finite element method is a natural choice, but requires special techniques to treat all these features within the bounds of affordable high performance computing. We have demonstrated the parallel scalability of a faulted crust finite element system, GeoFEST. But in three dimensions, element size must be automatically scaled to the local physics. Otherwise extra elements are used, leading to extravagant waste on the order of an inverse-length cubed in memory (and I/O) and at least fourth-power in flops. We apply the PYRAMID parallel adaptive mesh refinement library to generate the needed elements based on an initial coarse mesh, solution, and a strain energy metric. Application to models of the Landers earthquake and the interseismic Los Angeles basin compression highlight the utility and long-range potential of this method for interpreting space geodetic measurements.
DE: 6929 Ionospheric physics (2409)
DE: 6969 Remote sensing
DE: 1243 Space geodetic surveys
SC: Special Focus: Advances in Data Acquisition, Management, Analysis and Display [SF]
MN: 2004 AGU Fall Meeting