Deep crustal imaging by wide-angle seismic data using seismic interferometry
| 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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Report
(4 results)
Research Products
(24 results)
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[Presentation] Prominent reflector beneath around the segmentation boundary between Tonankai-Nankai earthquake area2013
Author(s)
Ayako NAKANISHI, Norio SHIMOMURA, Gou Fujie, Shuichi KODAIRA, Koichiro OBANA, Tsutomu TAKAHASHI, Yojiro YAMAMOTO, Mikiya YAMASHITA, Narumi TAKAHASHI, Yoshiyuki KANEDA, Kimihiro Mochizuki, Aitaro Kato, Takashi Iidaka, Eiji Kurashimo, Masanao Shinohara, Tetsuya Takeda, Katsuhiko Shiomi
Organizer
AGU Fall Meeting 2013
Place of Presentation
Moscone center, San francisco, United States of America
Related Report
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[Presentation] Prominent reflector beneath around the segmentation boundary between Tonankai-Nankai earthquake area2013
Author(s)
Ayako NAKANISHI , Norio SHIMOMURA ,Gou Fujie , Shuichi KODAIRA ,Koichiro OBANA , Tsutomu TAKAHASHI, Yojiro YAMAMOTO ,Mikiya YAMASHITA , Narumi TAKAHASHI , Yoshiyuki KANEDA,Kimihiro Mochizuki ,Aitaro Kato ,Takashi Iidaka, Eiji Kurashimo, Masanao Shinohara, Tetsuya Takeda ,Katsuhiko Shiomi
Organizer
AGU Fall Meeting 2013
Place of Presentation
Moscone Center, San francisco, United States of America
Related Report
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