| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
By analyzing the long-period ground motions (LPGs) during moderate to large earthquakes recorded in the Kanto sedimentary basin, we found that the amplitude and dominant period of the Fourier velocity spectrum of LPGs is large and long for the horizontal motions compared with the vertical motions, indicating that the Love wave is dominant in the LPGs. We also found that the dominant period of LPGs becomes longer in the middle part of the Boso peninsula.
Our 3D numerical simulation of LPGs using a seismic velocity structure model called the Smoothed Basin Velocity Structure Model (SBVSM) demonstrated that this model has a potential to explain observed amplitude and envelope of LPGs in the Kanto sedimentary basin, except for the Tokyo bay area including the middle part of the Boso peninsula.
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