5:15 PM - 6:30 PM
[SSS31-P03] Seismic reflection survey across the coseismic surface ruptures of the 2014 nagano-ken-hokubu earthquake of Mw 6.2, central Japan
Keywords:seismic reflection survey, 2014 Nagano-ken-hokubu earthquake, Kamishiro fault, Itoigawa–Shizuoka tectonic line active fault system
The source used in this survey was Enviro Vib (IVI Inc.). Sweep length was 16 sec and sweep frequency range beginning at 10 Hz up to 100 Hz. The receiver was GS-20DX (natural frequency, 10 Hz; Geospace Inc.). The source interval was 20 m and the receiver spacing was 10 m, with 192 ch geophones used for each recording. We selected the Geode recording system (Geometrics) and its sampling rate is 1 msec.
We thank Hakuba village office, Himekawa construction company, and Hakuba-mitsuno construction company for their assistance with our seismic survey.