6:15 PM - 7:30 PM
[SCG57-P35] Study on heterogeneous structure beneath the Beppu-Haneyama fault zone
Keywords:Beppu-Haneyama fault zone, heterogeneous structure, reflector
We analyzed the data observed at seismic stations deployed by Kyushu and Kyoto Universities, NIED and JMA. For simplicity, we assumed homogeneous velocity structure to analyze the observed data. Normal move-out (NMO) processing was applied to detect reflectors. Seismic section normal to the strike direction of the fault zone reveals that reflective zone of the depth about 25km, which could correspond to the Moho discontinuity. Since numerous reflected waves beneath the seismogenic zone were detected. The distribution of the reflectors generating these reflected phase might relate to the thickness of the zone.