Real-time Prediction of Earthquake Ground Motion Using Seismic Records Observed in Deep Boreholes

摘要

In the case of local earthquakes, a method for predicting earthquake ground motion directly using P-waves observed in deep boreholes, makes it possible to issue earthquake early warnings more simply and reliably compared with the present system. In addition, a method for predicting earthquake ground motion using S-waves observed in deep boreholes and S-wave velocity structures, makes it possible to show the planar distribution of earthquake ground motion, which may narrow down the areas where emergency inspections should be conducted following earthquakes. To develop those two methods, investigations were conducted into the relationship between the peak amplitudes of earthquake motion on the surface and those in deep boreholes using seismic records from KiK-net.