SEGJ Technical Conference

Construction of underground structure model in the fault neighborhood ( An example of Fukaya fault and Ayasegawa fault Part2 )

Abstract We have created a subsurface structure model from seismic bedrock to ground surface in the Kanto region, which takes into account the period and amplification characteristics (Senna et al., 2013). In order to obtain a more sophisticated and detailed ground model, we have investigated a method, in which the ground model correspond to local change in the ground like a fault. And we have conducted a detailed survey and analysis for the Fukaya fault zone and the Ayasegawa fault zone neighborhood as a test site (Senna et al., 2015). In this study, based on the past research (Senna et al., 2015), we evaluated the changes in S-wave velocity structure and ground motion characteristics of the ground in the direction of fault strike by using records of microtremor survey. In addition, we compared analysis results for records of microtremor observation with that one for earthquake ground motion observed near the fault.