| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Beyond the traditional framework of the 1-D velocity structure, the horizontal-to-vertical spectral ratio (HVSR) of microseisms, derived from full-wave field in a three-dimensional topographical model (the Osaka sedimentary basin) was produced by finite differential method (FDM)-based simulation.
The FDM simulations confirmed the phenomena such as the polarization of the peak amplitude of the HVSRs in grabens and step structures in the sediment-bedrock interface. In addition, it was showed that the features of the peak frequency, the peak value and the shape of HVSRs in areas with strong irregularities in the sediment-bedrock interface are different from those of the HVSR estimation based on the 1-D velocity structure model.
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