2013 Fiscal Year Final Research Report
Effective observation distribution toward higher detectability of megathrust earthquakes focusing on off Tokachi and off Miyagi
| Project/Area Number |
23710212
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Natural disaster science
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
ARIYOSHI Keisuke 独立行政法人海洋研究開発機構, 地震津波・防災研究プロジェクト, 技術研究副主任 (20436075)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 海溝型巨大地震 / 海底地殻変動 / 浅部ゆっくり地震 |
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| Research Abstract |
We performed numerical modeling of megathrust earthquakes with chain reaction of multi asperities including slow earthquakes.
From this study, (i) we found that the following earthquake of a coupled earthquake is amplified for co-seismic slip in case of short time delay and for pre- and post-seismic slip in case of long-time delay. (ii) We also pointed out that shallow slow earthquake is expected to be active on the outer rim of strong coupling generating megathrust earthquake. (iii) Levelling change of shallow slow earthquake may be detectable for seafloor pressure gauge by subtracting stack among observation points of the same node from original data at each point.
These results have been published in the international geoscience journals and presented for the several international meetings as invited talk.
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[Journal Article] Migration process of very low-frequency events based on a chain-reaction model and its application to the detection of preseismic slip for megathrust earthquakes2012
Author(s)
Ariyoshi, K., T. Matsuzawa, J.-P. Ampuero, R. Nakata, T. Hori, Y. Kaneda, R. Hino, A. Hasegawa
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Journal Title
Earth, Planets and Space
Volume: vol.64,No.8
Pages: 693-702
DOI
Peer Reviewed
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[Presentation] The detectability of slow earthquakes in shallower part of subduction zone around Tonankai earthquake by the Dense Oceanfloor Network system for Earthquakes and Tsunamis (DONET)2013
Author(s)
Ariyoshi, K., R. Nakata, T. Hori, Y. Kaneda, T. Matsuzawa, R. Hino, A. Hasegawa
Organizer
American Geophysical Union Fall Meeting, G14A-02
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2013-12-09
Invited
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[Book] Application of Vector-Type Super Computer to Understanding Giant Earthquakes and Aftershocks on Subduction Plate Boundaries, Sustained Simulation Performance 2012, Michael M. Resch, Xin Wang, Wolfgang Bez, Erich Focht, Hiroaki Kobayashi (Ed.)2013
Author(s)
Ariyoshi, K., T. Matsuzawa, Y. Yabe, N. Kato, A. Hasegawa, Y. Kaneda
Total Pages
67-80
Publisher
Springer Berlin Heidelberg(ISBN: 978-3-642-32453-6 (Print) 978-3-642-32454-3 (Online), doi: 10.1007/978-3-642-32454-3)
DOI
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