| Project/Area Number |
23540504
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
FUJIE Gou 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 技術研究副主幹 (50371729)
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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 |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 地震波干渉法 / 海底地震計 / エアガン / 構造探査 / 重合前深度マイグレーション |
|---|
| Research Abstract |
Wide-angle seismic reflection and refraction survey data obtained by Ocean Bottom Seismometers (OBSs) are effective for constraining long-wavelength seismic velocities and deep structures, but the large OBS spacing, typically 5 or 6 km, prevents us from applying waveform analysis techniques like waveform inversion and seismic migration. Seismic Interferometry (SI) has a potential to overcome this difficulties, because we can redatum sparse sea floor receiver gathers into dense sea surface receiver gathers by applying SI to OBS data. The syntheseized dense wide-angle data enable us to image high-resolution seismic structure by applying Pre-Stack Depth Migration (PSDM). We studied technical details for effective imaging of detailed seismic structure by SI + PSDM method. Consequently, we successfully imaged seafloor, sediments, and deep reflectors at a depth of more than 10km by using only sparse OBS data.
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