HR: 0800h
AN: S31A-1031    [Abstracts]
TI: Some Primary Observation from Earthquake Scenario Simulation Using Numerical Green Functions
AU: * Wang, H
EM: haijiang@geophysik.uni-muenchen.de
AU: Igel, H
EM: igel@geophysik.uni-muenchen.de
AB: Deterministic earthquake scenario simulation methods are playing an increasingly important role in seismic hazard and risk estimation. The numerical calculation of the complete wavefield in the observed frequency band for a seismically active basin remains a computationally expensive task for some time. Our aim is to provide a tool with which we can calculate a large number of difference finite source scenarios for a particular fault or fault system. In order to avoid having to calculate an individual scenario for each kinematic source description we propose the concept of "numerical Greens functions" (NGFs). The basic idea is that: a large seismic fault is divided into subfaults of appropriate size which will be found out with a trial and fail method. For those subfaults synthetic seismograms for the whole surface of this seismic active area are calculated and stored for the regional velocity model. Within some limitations, arbitrary kinematic sources can be simulated for the whole fault or parts of it by superposition of this set of separate seismograms obtained by the stored subfault excitations. In this work we test the potential of the NGF approach to simulate the seismicity and the associated seismic hazard for a given region and earthquake statistics
DE: 3210 Modeling
SC: Seismology [S]
MN: 2004 AGU Fall Meeting