An earthquake is a phenomenon, which begins at its source with fault
ruture and is completed after the propagation of generated “seimic
shaking” through velocity structures and the excitation of seismic
ground motions/seismic waves and deformations at a site (Fig. 1).
This laboratory works for these seismic ground motions/seismic waves,
and ground deformations based on the research theme:
"Think Seismic Shaking Scientifically."
Although both seismic ground motions and seismic waves represent
“seimic shaking”, it can be common that shakings in the
near-field of an earthquake source are called seismic ground motions,
and those in the far-field are called seismic waves.
Among them, our principal research subject is seismic ground motion
including ground deformation, such as strong shaking causing disasters
(strong ground motion) and long-period ground motion.
In 2018, the book entitled "Physics of Seismic Ground Motion" was
published to explain the equations and methods used in analyses and
computations of seismic ground motion.
Fig. 1. Seismic shaking and seismic ground motions/seismic waves (based on Taga, 1982).