Japan Geoscience Union Meeting 2016

Presentation information

Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-TT Technology & Techniques

[M-TT31] Brand-new scope of coupling geophysics being established by infrasound and associated waves

Thu. May 26, 2016 9:00 AM - 10:30 AM 202 (2F)

Convener:*Masa-yuki Yamamoto(Department of systems engineering, Kochi University of Technology), Nobuo Arai(Disaster Mitigation Research Center, Nagoya University), Mie Ichihara(Earthquake Research Institute, University of Tokyo), Chair:Masa-yuki Yamamoto(Department of systems engineering, Kochi University of Technology), Nobuo Arai(Disaster Mitigation Research Center, Nagoya University)

9:15 AM - 9:30 AM

[MTT31-02] Detection of infrasound from the landslide and earthquakes in Taiwan –primary results

*Yoshihiro Kakinami1,2, Masa-yuki Yamamoto2, Chun-Rong Chen1, Horng-Yuan Yen1, J. J. Dong1, Chung-Pai Chang1 (1.National Central University, 2.Kochi University of Technology)

Keywords:infrasound, landslide, Taiwan, Kaohsiung earthquake

After large earthquakes and tsunamis occur, infrasound emitted from the epicenters and tsunami source areas are often observed. Using triangulation method, identification of the sources are being attempted. Since such phenomena accompanying large motion of ground/sea surface often emit infrasound, landslide is also highly expected to emit the infrasound. In fact, people often reported some uncertain noise just after the landslide occurred. Although less scientific report of infrasound observation from the landslide has been done so far, we try to detect the infrasound emitted from the landslide. In order to achieve the purpose, we started observation of the infrasound in Taoyuan (23.1607°N, 120.7658°E) and Dabu (23.3005°N, 120.6296°E), Taiwan from July 2015. In this paper, we introduce our observation sites and primary results of power spectrum and landslides identification from the infrasound. Furthermore, the infrasound emitted accompanying the M6.4 Kaohsiung (Meinong), Taiwan earthquake (22.871°N, 120.668°E) occurred 33 km away from the Taoyuan observatory at 19:57:27 UTC on 5 February 2016 was observed. The results before and after the earthquake are also shown.