HR: 13:40h
AN: S53C-01 INVITED    [Abstracts]
TI: Robustness Tests for Reliably Determining the Earthquake Rupture Process
AU: * Das, S
EM: das@earth.ox.ac.uk
AF: Department of Earth Sciences University of Oxford, Parks Road, Oxford, OX13 PR, United Kingdom
AU: Robinson, D
EM: davidr@earth.ox.ac.uk
AF: Department of Earth Sciences University of Oxford, Parks Road, Oxford, OX13 PR, United Kingdom
AB: Problems related to the determination of the earthquake rupture process details from analysis of body-wave seismograms was first discussed by Kostrov in 1974. We discuss how to use robustness tests to identify the reliable properties of the rupture process obtained from inversion of broadband body wave data (Das and Kostrov, JGR 1990; PEPI 1994). We then interpret the results for the following submarine subduction zone earthquakes: the Mw 8.0 Andreanof Islands earthquake (Das and Kostrov, ibid.), the Mw 8.2 Biak, Indonesia earthquake (Das et al., JGR, 2000) and the Mw 8.4 2001 Peru earthquake (Robinson et al., Science, 2006), in terms of subducting seafloor features and its influence on the earthquake rupture process. In particular, subducting seamounts appear to be affecting the rupture process of all these great earthquakes. The question of how much of a seamount still remains after it is subducted to be able to affect the earthquake rupture on the subduction plane will be addressed.
DE: 7200 SEISMOLOGY
DE: 7209 Earthquake dynamics (1242)
DE: 7215 Earthquake source observations (1240)
DE: 7260 Theory
SC: Seismology [S]
MN: 2007 Fall Meeting