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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Examination of one-dimensional S-wave velocity structure using strong-motion data for high-seismic-intensity area during the 2018 Hokkaido Eastern Iburi earthquake

Fig. 8

Comparison of velocity waveforms for the event at 9:48 JST September 14, 2018, Mw 4.2. The black line indicates the observed waveform. The green and red lines are the synthesized waveforms obtained using the structure in model 1 and in this study (model 2), respectively. These models inserted JIVSM (VS of 3.4–4.5 km/s) below the seismic bedrock. The values with unit cm/s for each color on the graph represent the peak ground velocity for that color waveform. The black value with unit s represents the lag time of the S-wave initial motion of the observed records and the green and red ones represent the time differences between the observed and synthesized S-wave initial motion

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