Seismic heterogeneous structures based on auto-correlation analysis of ambient noise on ocean-bottom seismometer recoreds
| Project/Area Number |
22740288
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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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 |
ITO Yoshihiro 東北大学, 大学院・理学研究科, 助教 (30435581)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 地震波干渉法 / 自己相関関数 / 地震波反射面 / 沈み込み帯 / 二重地震面 / 東北日本 / 二重深発地震面 / 散乱波 / 反射波 / 流体 / 太平洋プレート |
|---|
| Research Abstract |
We obtained ambient seismic noise interferograms as seismic reflection images using autocorrelation functions (ACFs) in the northeastern Japan subduction zone. We constructed depth-migrated images using the ACFs. The depth-migrated images show a relatively seismically transparent structure within the subducting Pacific slab and a reflective structure within the mantle wedge. Furthermore, the migrated images show seismic scatterers within the subducting Pacific Slab. These images suggest that seismic scatterers, such as fluid from dehydration reactions of the hydrated metamorphosed mantle, exist in the lower as well as upper plane of the seismicity in the double seismic zone.
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Report
(4 results)
Research Products
(22 results)
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[Presentation] Seismic velocity changes associated with the 2005 M7.2 Miyagi-Oki Earthquake, NE Japan revealed from seismic interferometry2011
Author(s)
Chujo, K., Y.Ito, H.Nakahara, R.Hino, T.Yamada, M.Shinohara, T.Kanazawa
Organizer
AGU 2011 Fall Meeting
Place of Presentation
Moscone Center, San Francisco, USA
Year and Date
2011-12-05
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[Presentation] Autocorrelation analysis of ambient noise in NE Japan2010
Author(s)
Ito, Y., Chujo, K., Takagi, R., Hino, R., Suzuki, S., Yamada, T., Shinohara, M., Kanazawa, T., Murai, Y., Shiomi, K.,and Obara K
Organizer
14^<th> International Symposium on Deep Seismic Profiling of the Continents and their Margins
Place of Presentation
Cairns, Australia
Year and Date
2010-08-28
Related Report
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