Japan Geoscience Union Meeting 2019

Presentation information

[J] Oral

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

[M-TT49] Brand-new scope of coupling geophysics being established by infrasound and associated waves

Thu. May 30, 2019 10:45 AM - 12:15 PM 202 (2F)

convener:Masa-yuki Yamamoto(Department of systems engineering, Kochi University of Technology), Mie Ichihara(Earthquake Research Institute, University of Tokyo), Nobuo Arai(Disaster Mitigation Research Center, Nagoya University), Chairperson:Masa-yuki Yamamoto(Kochi University of Technology), Hiroaki Saito(Kochi University of Technology)

11:15 AM - 11:30 AM

[MTT49-03] Infrasound observations of atmospheric disturbances due to a sequence of 2018 explosive volcano eruptions in Japan.

*Mario Batubara1, Masa-yuki Yamamoto1, Saito Hiroaki1 (1.Kochi University of Technology)

Keywords:Infrasound, propagation speed, irregular array processing

In this opportunity, we describe our quantitaive approach for investigating the potential atmospheric effects caused by a sequence of Japanese volcano eruptions in 2018. We used data from a number of infrasound sensors located on Shikoku Island, Japan, to detect the long wave traveling air disturbances likely to have been caused by the explosive eruptions of the volcano. We then identified certain characteristic signatures of the disturbances in individual infrasound pressure records. Based on their arrival times, we have found that the overall propagation speed of the disturbances is in the range of standard sound propagation in the atmospheric boundary layer.