| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Research Abstract |
This study proposed an inversion analysis of the maximal amplitudes to estimate the 3D structure of intrinsic attenuation. Application in the northeastern Japan clarifies the weak attenuation in the forearc side, and strong attenuation beneath the Quaternary volcanoes and collision zone between the Honshu and Kuril arcs. Study in the northern Izu arc revealed that strong attenuation regions are distributed beneath the Quaternary volcanoes, and that attenuation in the forearc side is weaker than the forearc side in the northeastern Japan. Independent component analysis extracts some components that are related to tectonic conditions. These components are characterized by large contributions from the attenuation and inhomogeneities.
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