JpGU-AGU Joint Meeting 2020

Presentation information

[J] Oral

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

[M-TT52] Brand-new scope of coupling geophysics being established by infrasound and associated waves

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), Takayuki Otsu(Japan Weather Association)

[MTT52-02] A variety of Infrasound signals excited by meteor

*Makiko Iwakuni1, Takayuki Otsu1, Nobuo Arai2, Mami Nogami1, Masashi Motohashi1, Takanari Fujii1, RYOHEI EMURA1, Takahiko Murayama1 (1.JAPAN WEATHER ASSOCIATION, 2.Disaster Mitigation Research Center, Nagoya University)

Keywords:Infrasound, Meteor, Microbarograph, CTBT

The infrasound observation system has been installed in Isumi, Chiba-prefecture (approximately 60 km SE of Tokyo) as a component of the International Monitoring System for the verification regime of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). It is an array observation site and is comprised of 6-element centered pentagon array with an aperture of about 2km. It had been deployed on November 2004.
Infrasound observation system sometimes detected signal generated by meteor. For instance, infrasound signal by a meteor over Kanto region on January 2013 was detected at Isumi. Isumi microbarographs recorded impulse wave due to shock wave. This result was reported at JpGU2013. By increasing detected infrasound cases by meteor, we want to extract the characteristics if the infrasound signal generated by meteor. For purposes of the CTBT, since the signal by meteor is noise, signals by meteor can be distinguished from infrasound waveform data would also contribute to the CTBT's verification regime.