2012 Fiscal Year Final Research Report
Examination of the Arc-arc collision process and its relationship with deformation mechanism of the Pacific slab, beneath the Hokkaido
| Project/Area Number |
23740329
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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 |
Solid earth and planetary physics
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| Research Institution | Tohoku University |
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Principal Investigator |
KITA Saeko 東北大学, 大学院・理学研究科, COE フェロー (10543449)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 地震現象 / 地震波速度構造トモグラフィー |
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| Research Abstract |
Using travel time data from both a nationwide dense seismic network and a dense temporary seismic network, we obtain a high-resolution three-dimensional seismic velocity structure beneath the Hokkaido corner. Our results suggest that these two large and anomalously deep inland earthquakes occurred at sharp material boundaries under a northeast-southwest compressional stress field caused by ongoing arc-arc collision process.
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[Journal Article] Large intraslab earthquake (2011 April 7M7.1) after the 2011 off the Pacific coast ofTohoku earthquake (M9.0): Coseismic fault model based on the dense GPS network data2011
Author(s)
Ohta, Y. S. Miura, M. Ohzono, S. Kita, T. Iinuma, T. Demachi, K. Tachibana, T. Nakayama, S. Hirahara, S. Suzuki, T. Sato, N. Uchida, A. Hasegawa, and N. Umino
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Journal Title
Earth, Planets and Space
Volume: 63
Pages: 1207-1211
DOI
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