Abstract
Source, path, and site effects for subduction and crustal earthquakes in eastern and western Japan were estimated by spectral inversion analyses using about 10,000 strong motion records observed at 895 sites in Japan. Flat level of acceleration source spectra for the Tottori-ken Seibu earthquake were half of that for the Hyogo-ken Nanbu earthquake. Stress drops for crustal earthquakes were less than those for subduction earthquakes. Stress drops for subduction earthquakes in eastern Japan were bigger than those for subduction earthquake in Hyuganada region. It was found that stress drops for big crustal earthquakes were larger than the other small- and middle-sized crustal earthquakes.
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