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- W2895568939 endingPage "8956" @default.
- W2895568939 startingPage "8937" @default.
- W2895568939 abstract "Abstract Two ground motion prediction equation models for subduction zones have been tested using a public ground motion database of the KiK‐net records obtained by automated processing protocols (Dawood et al., 2016, https://doi.org/10.1193/071214EQS106 ). The database contains records of more than 700 interface earthquakes that occurred on the Japan subduction between 1998 and 2012. The Zhao et al. (2006, https://doi.org/10.1785/0120050122 ) ground motion prediction equation was shown to be the best suited model for the region. It was then used as backbone to analyze the variability of ground motion records. The residuals between observed and predicted ground motions have been analyzed to study the spatial variation of the earthquakes' ground motion frequency content on the Japan megathrust. This analysis revealed a depth dependency of generated ground motions consistent with the downdip segmentation proposed for subduction interfaces (Lay et al., 2012, https://doi.org/10.1029/2011JB009133 ), a regional ground motion dependency that may be related with lateral variations of the mechanical properties of the subduction interface and a high‐frequency radiations drop in the earthquake sequence that preceded the Tohoku‐Oki earthquake M w 9.0. The regional ground motion dependency suggests the existence of different domains along trench of the Japan subduction megathrust that control the ground motions and the wave radiation patterns of interface earthquakes. The location of their boundaries is consistent with the extension of the rupture of the 2011 Tohoku‐Oki earthquake, with pre‐Tohoku interseismic coupling, and with the free air gravity anomalies." @default.
- W2895568939 created "2018-10-12" @default.
- W2895568939 creator A5019855182 @default.
- W2895568939 creator A5053237040 @default.
- W2895568939 creator A5055696814 @default.
- W2895568939 date "2018-10-01" @default.
- W2895568939 modified "2023-10-18" @default.
- W2895568939 title "Insights on the Japanese Subduction Megathrust Properties From Depth and Lateral Variability of Observed Ground Motions" @default.
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