Infrasound signals in Cocos Islands (I06AU) associated with eruption or volcanic body collapse of the Anak Krakatau Volcano or tsunami

Makiko Iwakuni; Nobuo Arai; Takayuki Otsu; Masashi Motohashi; Takanari Fujii; Mami Nogami; Takahiko Murayama; Takuma Oi

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[J] Poster

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 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

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)

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[MTT49-P01] Infrasound signals in Cocos Islands (I06AU) associated with eruption or volcanic body collapse of the Anak Krakatau Volcano or tsunami

*Makiko Iwakuni¹, Nobuo Arai², Takayuki Otsu¹, Masashi Motohashi¹, Takanari Fujii¹, Mami Nogami¹, Takahiko Murayama¹, Takuma Oi³ (1.Japan Weather Association, 2.Disaster Mitigation Research Center, Nagoya University, 3.Toho Mercantile co., Ltd.)

Keywords:Infrasound, Volcano

Severe tsunami occurred on December 22, 2018, and it was clarified by SAR analysis of GSI (Geospatial Information Authority of Japan) or visual observation by PVMBG (Pusat Vulkanologi dan Mitigasi Bencana Geologi, Indonesia) that southwest area of The Anak Krakatau collapsed. The infrasound array of the Cocos Islands (CTBTO IMS Infrasound Network: I06AU) locate about 1160 km southwest of The Anak Krakatau Volcano. Travel time of infrasound waves is estimated approximately 58 minutes. I06AU started to detect infrasound signals which came from the direction of The Anak Krakatau Volcano and recorded some remarkable infrasound wave-trains at 15:01:20-15:02:00UTC.