Japan Geoscience Union Meeting 2015

Presentation information


Symbol S (Solid Earth Sciences) » S-SS Seismology

[S-SS28] Active faults and paleoseismology

Wed. May 27, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Takashi AZUMA(National Institute of Advanced Industrial Science and Technology), Nobuhiko Sugito(Faculty of Humanity and Environment, Hosei University), Satoshi Tonai(Department of Applied Science, Faculty of Scienece, Kochi University), Toshikazu Yoshioka(Active Fault and Earthquake Research Center, National Institute of Advanced Industrial Science and Technology)

6:15 PM - 7:30 PM

[SSS28-P11] Surface rupture of the 2014 Kamishiro fault earthquake

*Daisuke HIROUCHI1, Nobuhiko SUGITO2, Heitaro KANEDA3, Hideaki GOTO4, Nobuhisa MATSUTA5, Yasuhiro SUZUKI6, Satoshi ISHIGURO7, Yasuhiro KUMAHARA4, RESEARCH, Group GEOMORPHOLOGICAL1 (1.Shinshu Univ., 2.Housei Univ., 3.Chiba Univ., 4.Hiroshima Univ., 5.Okayama Univ., 6.Nagoya Univ., 7.National Institute for Envronmental Studies)

Keywords:The 2014 Kamishiro fault earthquake, surface rupture, ISTL active fault zone

The Kamishiro fault is located in the northernmost part of the 150-km-long Itoigawa-Shizuoka Tectonic Line (ISTL) active fault zone, central Japan. Immediately after the destructive Mj 6.7 earthquake of November 22, 2014, which occurred in the northern part of the Nagano Prefecture, we conducted field reconnaissance surveys, and found coseismic surface ruptures exactly along the northern part of the reverse-faulting Kamishiro fault. Based on our surveys, in addition to the reports of other universities or research institutes, primary coseismic surface ruptures extend for ca. 9 km, most of which runs along the previously-identified active fault traces (Research Group for ISTL Tectonic Landforms, 2007; Suzuki et al., 2009, 2010). Various methodologies to record the surface ruptures have been applied until now, including aerial photographs, UAV and high-pole SfM, TLS (Terrestrial Laser Scanner), AL (Auto Level), and TS (Total Station), as reported in other presentations.