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)

Infrasound and associated wave studies are recently focused on coupling waves with long-distance and vertical propagation characteristics. Such kinds of waves, having with coupling process between the atmosphere and the surface of ground and ocean, are linked with elastic waves in lithosphere and oceanic sphere, as well as to atmospheric regions up to the upper atmosphere, playing a role of generating many kinds of wavelike turbulences in thermosphere. Moreover, whole on the globe, these waves excited depending on the latitude regions, as well as on the environmental regions, such as snow ice, desert, rainforest, mountain, ocean, etc., have their own characteristics. These waves can be excited by large-scale geophysical events like volcanic eruptions, tsunami, thunderstorms, etc. as well as artificial explosions, propagating with long distance.
In this session, we would like to discuss such "coupling geophysics" by using many new or well-known investigated data and simulations of infrasound and associated low frequency waves. It can combine multiple spheres in geophysics and bring a brand-new scope of geophysics. Your contributions from many regions are welcome!

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9:00 AM - 9:15 AM

[MTT31-01] Comparison of nonlinear wavelets observed by both infrasound and seismometers in polar regions

*Masaki Kanao¹, Masa-yuki Yamamoto², Yoshiaki Ishihara³, Takahiko Murayama⁴, Takeshi Matsushima⁵, Mitsuru Matsumura¹ (1.National Institute of Polar Research, 2.Kochi University of Technology, 3.JAXA, 4.Japan Weather Association, 5.Kyushu University)

9:15 AM - 9:30 AM

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

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

9:30 AM - 9:45 AM

[MTT31-03] Locating snow avalanches by using of infrasound array data

*Nobuo Arai¹, Toshiaki Imai², Masaya Otsuki², Yoshihiko Saito², Takahiko Murayama³, Makiko Iwakuni³ (1.Disaster Mitigation Research Center, Nagoya University, 2.Yukiken Snow Eaters Inc., 3.Japan Weather Association)

9:45 AM - 10:00 AM

[MTT31-04] Comparison of seismic waveforms observed by microbarograph with broadband accelerometer

*Makiko Iwakuni¹, Takahiko Murayama¹, Nobuo Arai², Mie Ichihara³, Kazutaka Mannen⁴, Jerome M. Paros⁵, Takuma Oi⁶ (1.Japan Weather Association, 2.Disaster Mitigation Research Center, Nagoya University, 3.Earthquake Research Institute, University of Tokyo, 4.Hot Spring Research Institute of Kanagawa Prefecture, 5.Paroscientific, Inc. and Quartz Seismic Sensors, Inc., 6.Toho Mercantile co., Ltd.)

10:00 AM - 10:15 AM

[MTT31-05] Relationship Between Amplitudes of Infrasound and Ionospheric TEC Disturbances by Vulcanian Volcanic Explosions

*Yuki Nakashima¹, Yosuke Aoki², Kiwamu Nishida², Shingo Fujita¹, Kosuke Heki¹ (1.Natural History Sciences,Graduate School of Science, Hokkaido University, Earth and Planetary Dynamics, 2.Earthquake Research Institute, University of Tokyo)

10:15 AM - 10:30 AM

[MTT31-06] Power spectral density distribution of micro-barometric variation around the transition region between acoustic mode and internal mode gravity waves

★Invited papers

*Toshihiko Iyemori¹, Yoko Odagi², Tadashi Aoyama³, Yasuharu Sano², Yoshikazu Tanaka³ (1.Data Analysis Center for Geomagnetism and Space Magnetism, Graduate School of Science, Kyoto University, 2.Asahi University, 3.Graduate School of Science, Kyoto University)