| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2017: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Outline of Final Research Achievements |
We studied the physical mechanism of tsunami ionospheric hole and apply its detection to the early warning system of tsunami arrival. Once the tsunami occurred in the large earthquake, infrasonic waves were excited. The waves propagated into the ionosphere. When the waves arrived at the ionospheric E regions, the ionospheric disturbances generated by the infrasonic waves caused the ionospheric current. The current generated the geomagnetic variations. The, the waves arrived the ionospheric F regions, the tsunami ionospheric hole occurred. From the size estimation of the tsunami ionospheric hole, we can estimate the initial tsunami distribution. In our preliminary estimation of the 2011 Tohoku Earthquake, we roughly replicated the tsunami height near the coast.
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