Propagating atmospheric acoustic wave in Japan by the Hunga Tonga-Hunga Ha'apai volcano eruption

Makiko Iwakuni; Nobuo Arai; Takayuki Otsu; Masashi Motohashi; Takanari Fujii; Mami Nogami

Presentation information

[J] Poster

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

[M-TT45] Brand-new scope of coupling geophysics being established by infrasound and associated waves

Mon. May 30, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (39) (Ch.39)

convener:Masa-yuki Yamamoto(Department of systems engineering, Kochi University of Technology), convener:Mie Ichihara(Earthquake Research Institute, University of Tokyo), convener:Takayuki Otsu(Japan Weather Association), Chairperson:Masa-yuki Yamamoto(Department of systems engineering, Kochi University of Technology)

11:00 AM - 1:00 PM

[MTT45-P05] Propagating atmospheric acoustic wave in Japan by the Hunga Tonga-Hunga Ha'apai volcano eruption

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

Keywords:Infrasound, Sensitive Microbarograph

Japan Weather Association (JWA) has maintained and managed the infrasound observation system (MB2000, manufactured by CEA/DASE) in Chiba Prefecture since 2005, as a component of the International Monitoring System for CTBT's verification scheme. Based on such experiences, JWA installed and have managed the infrasound observations systems (Model 6000-16B, manufactured by Paroscientific, Inc., USA) in Iwate and Mie, and Aichi Prefectures for research purpose to apply infrasound technology to disaster mitigation.

On January 15, 2022, the Hunga Tonga-Hunga Ha'apai volcano erupted, then all infrasound observation systems of JWA observed the characteristic signals, which have a period of about 30 minutes (Lamb wave) and similar shape among all observation sites. In this presentation, we discuss the similarities and propagation of these signals over Japan.