| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2014: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2012: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
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| Outline of Final Research Achievements |
In addition to direct P and S wave arrivals, we add the travel times of the later phases, which are Ps converted phases obtained from Receiver Functions and the reflected phases recorded by seismic interferometry to estimate the 3-D seismic velocity structure including velocity discontinuity interfaces, which is called 'seismic velocity discontinuity tomography'. However, there remains a problem that is the less accuracy of estimated arrival times of both Ps converted and reflected phases. And the inversion code for simultaneously estimating both velocity discontinuity interfaces and 3-D velocities has not yet completely developed. We need further improvements in obtaining the arrival times of later phases and in developing the inversion code. Furthermore, we developed earthquake cycle simulation codes for considering the non-planar earth’s surface and plate interfaces which are estimated by velocity discontinuity analyses.
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