Name : FURUMURA,  Takashi
            Position : Associate Professor
            Division/Center : Division of Disaster Mitigation Science
            Research Area : Numerical simulation of strong ground motion

 Research:

       The seismic wavefield is significantly affected by 3D variations in crustal structure both in the source zone itself and in propagation to
       some distance, and such effects can be modeled by large-scale numerical 3D simulation of seismic wavepropagation by using
       powerful computers. We are developing a hybrid parallel simulation code with pseudospectral representation for horizontal
       coordinates and finite-difference in depth. This arrangement improves parallel efficiency with high speed-up rate using large number
       of processors on a parallel computer. Using this, numerical modeling of strong ground motion with a realistic 3D structural model has
       been conducted to represent the wave propagation from destructive earthquakes such as the 1995 Kobe earthquake and 1999
       Chi-Chi, Taiwan earthquake. In order to understand the process of strong ground motion generation during the damaging earthquakes,
       we are also keen on the visualization of seismic wave field.

Publications:

Takenaka, H., Y. Wang, and T. Furumura, An efficient approach of the pseudospectral method for modelling of geometrically symmetric seismic wavefield, Earth Planets Space, 51, 73--79, 1999.

Furumura, M., B.L.N. Kennett, and T. Furumura, Seismic wavefield calculation for laterally heterogeneous earth models-II. The influence of upper mantle heterogeneity, Geophys. J. Int., 139, 623--644, 1999.

Koketsu, K., and T. Furumura, Imaging earthquake fault rupture and simulating seismic ground motion, The Leading Edge, 18, 1414--1416, 1999.

Furumura, T., and K. Koketsu, Parallel 3-D simulation of ground motion for the 1995 Kobe earthquake: The component decomposition approach, Pure Appl. Geophys., 157, 1921--1936, 2000.