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Evaluation for hypocenter estimation error in the southwestern Kuril trench using Japan and Russia joint seismic data

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Title: Evaluation for hypocenter estimation error in the southwestern Kuril trench using Japan and Russia joint seismic data
Authors: Ichiyanagi, Masayoshi Browse this author
Mikhaylov, Valentin Browse this author
Kostylev, Dmitry Browse this author
Levin, Yuri Browse this author
Takahashi, Hiroaki Browse this author →KAKEN DB
Keywords: The southwestern Kuril trench
Hypocenter determination
Japan and Russia joint seismic network
Great subduction earthquakes
Tsunami warning
Issue Date: 16-Jun-2020
Publisher: Springer
Journal Title: Earth planets and space
Volume: 72
Issue: 1
Start Page: 86
Publisher DOI: 10.1186/s40623-020-01215-0
Abstract: The southwestern Kuril trench is seismically active due to the subduction of the Pacific plate. Great earthquakes in this zone have frequently induced fatal disasters. Seismic monitoring and hypocenter catalogs provide fundamental information on earthquake occurrence and disaster mitigation. Real-time hypocenter and magnitude estimates are extremely crucial data for tsunami warning systems. However, this region is located in the international border zone between Japan and Russia. The Japan Meteorological Agency and Russian Academy of Sciences have routinely determined hypocenters and issued earthquake information independently. Waveform data have not yet been exchanged internationally in real time. Here, we evaluated how a hypothetical Japan-Russia joint seismic network could potentially improve the hypocenter estimation accuracy. Experiments using numerical and observed data indicated that the joint network extended the distance over which hypocenters can be accurately determined over 100 km eastward compared to the Japan network only. This fact suggests that joint seismic data have the potential to improve the hypocenter accuracy in this region, which would provide improved performance in gathering disaster information at the moment of a tsunami warning.
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 一柳 昌義

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