断層上の動力学的破壊モデルパラメタの推定法に関する研究

概要

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An inversion method to infer dynamic rupture parameters of earthquake faults is presented. An earthquake fault is divided into subfaults. Assuming that stress drop occurs within the subfault and that stress drop in other area of the fault is 0, the ground motion generated by each subfault is calculated. The seismic wave of an earthquake can be expressed as the sum of the waves of each subfault. The rupture time and the stress drop of each subfault are used as dynamic rupture parameters. I applied the inversion method to a simple model using synthetic seismogram generated numerically by 3-D finite difference method. The inferred parameters are exactly the same as the ones used to calculate synthetic seismogram.
社団法人土木学会の論文