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Development and Assessment of Real-Time Fault Model Estimation Routines in the GEONET Real-Time Processing System

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International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH)

Part of the book series: International Association of Geodesy Symposia ((IAG SYMPOSIA,volume 145))

Abstract

The recent development of Global Navigation Satellite Systems (GNSS) and communication infrastructure provides real-time displacement data, enabling the real-time estimation of coseismic fault models for large earthquakes and the potential improvement of tsunami warning systems. In this paper, we present two real-time coseismic fault model estimation procedures implemented in the GEONET real-time processing system: a single rectangular fault model and a slip distribution model on the subducting plate interface. We evaluate the fault modeling procedures for two past large interplate earthquakes: the 2003 Tokachi-oki earthquake and the 2011 Tohoku earthquake. Furthermore, we also evaluate a potential large interplate earthquake along the Nankai trough based on simulated GPS time series. We obtained reasonable coseismic simple rectangular fault models for the past two large earthquakes. In contrast, the simulated interplate event along the Nankai trough clearly indicates the great advantage of estimation of the coseismic slip distribution on the plate interface. These results clearly show that reliable estimation of the coseismic fault model and/or slip distribution on the subducting plate interface will be possible in Japan based on the real-time GNSS data. This result will contribute to a more reliable tsunami early warning system.

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Acknowledgements

We would like to thank Yehuda Bock and two anonymous reviewers for their detailed and constructive reviews. We thank the International GNSS Service (IGS) for providing the products used in this study, the Japan Meteorological Agency (JMA) and the Global CMT (GCMT) project (Dziewonski et al. 1981; Ekström et al. 2012) for providing the moment tensor solutions.

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Authors and Affiliations

  1. Geospatial Information Authority of Japan, 1 Kitasato, Ibaraki, Japan

    Satoshi Kawamoto & Kohei Miyagawa

  2. Cabinet Secretariat, 2-4-12 Nagatacho, Tokyo, Japan

    Toshihiro Yahagi

  3. Center for Integrated Disaster Information Research, Interfaculty Initiative in Information Studies, The University of Tokyo, 1-1-1 Yayoi, Tokyo, Japan

    Masaru Todoriki

  4. Disaster Prevention Research Institute Kyoto University, Gokasho, Kyoto, Japan

    Takuya Nishimura

  5. Graduate School of Science, Tohoku University, 6-3 Aramaki Aza-Aoba, Miyagi, Japan

    Yusaku Ohta, Ryota Hino & Satoshi Miura

Authors
  1. Satoshi Kawamoto
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  2. Kohei Miyagawa
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  3. Toshihiro Yahagi
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  4. Masaru Todoriki
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  5. Takuya Nishimura
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  6. Yusaku Ohta
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  7. Ryota Hino
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  8. Satoshi Miura
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Correspondence to Satoshi Kawamoto .

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Editors and Affiliations

  1. Kyoto University, Disaster Prevention Research Institute Kyoto University, Uji, Kyoto, Japan

    Manabu Hashimoto

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Kawamoto, S. et al. (2015). Development and Assessment of Real-Time Fault Model Estimation Routines in the GEONET Real-Time Processing System. In: Hashimoto, M. (eds) International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH). International Association of Geodesy Symposia, vol 145. Springer, Cham. https://doi.org/10.1007/1345_2015_49

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