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●Fig. 1
Mainshock (red star) and aftershock distribution by manual picking of Hi-net data. The blue star shows the hypocenter of the mainshock estimated by P-wave arrivals at nearby 30 stations.
●Fig. 2
Two fault mechanisms estimated (left) by the distribution of the polarity for the P-wave first motion by Hi-net and (right) by the moment tensor analysis of F-net data.
●Fig. 3
Distributions of PGA and PGV on the surface (K-NET and KiK-net) and at the bottom of boreholes (KiK-net). Depths of the boreholes are 100 m or more and at most stations, S wave velocities at the bottom are more than 500 m/s. PGV are estimated by integrating the accelerograms.
●Fig. 4
Distribution of the observation stations used for the inversion analysis.
Two rectangles show the projection of the assumed fault planes. The red
star indicates the starting point.
●Fig. 5
Total slip distribution. There are two areas with large slips that correspond
to the two remarkable pulses in observed waveform.
●Fig. 6
Comparison between observed and synthetic waveforms.
●Fig. 7
Time progression of rupture.