Estimation of the factor determining interplate coupling from repeating earthquakes
Project/Area Number |
23740328
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Solid earth and planetary physics
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Research Institution | Tohoku University |
Principal Investigator |
UCHIDA Naoki 東北大学, 理学(系)研究科(研究院), 助教 (80374908)
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Project Period (FY) |
2011 – 2013
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Project Status |
Completed (Fiscal Year 2013)
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Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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Keywords | プレート境界地震 / 繰り返し地震 / 非地震性すべり / プレート間カップリング / 沈み込み帯 / 小繰り返し地震 / アスペリティ / 応力降下量 |
Research Abstract |
I have developed a method that can select medium-sized repeating earthquake by using rupture size and relative location of Kamaishi-oki earthquakes, then applied it to the NE Japan seismicity before and after the Tohoku-oki earthquake. The result show not only small repeating earthquake but also medium-sized repeating earthquakes are distributed largely outside of M7 and Tohoku-oki earthquake' s slip areas. The selected repeaters were also used to refine the slip rate and coupling estimation on the plate boundary. The stress drop of interplate earthquakes are also determined by using the repeaters. It show that the earthquakes in the large slip area for the 2011 Tohoku-oki earthquake have relatively small stress drop before the Tohoku-oki earthquake. I also found phenomena that the magnitude of repeating earthquake become larger after the Tohoku-oki earthquake.
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Report
(4 results)
Research Products
(45 results)
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[Journal Article] Seismic attenuation beneath northeastern Japan: Constraints on mantle dynamics and arc magmatism2013
Author(s)
Nakajima, J., Hada, S., Hayami, E., Uchida, N., Hasegawa, A., Yoshioka, S., Matsuzawa, T., & Umino, N.
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Journal Title
Journal of Geophysical Research: Solid Earth
Volume: 118
Issue: 11
Pages: 5838-5855
DOI
Related Report
Peer Reviewed
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