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Our understanding of earthquakes and Earth structure has been developed based on interpretation of broadband seismograms. The motion at observation point can be explained by two effects: the seismic source process and the propagation process (Earth structure response and attenuation). In this web-page, we assume Earth structure, and then we try to determine detailed source rupture process.

Source rupture process of the 2003 Tokachi-oki earthquake (Yagi, 2004, EPS)

Source Process of Recent Earthquakes