Estimation of earthquake information necessary for tsunami early warning
| Project/Area Number |
24540460
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Building Research Institute |
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Principal Investigator |
Hara Tatsuhiko 国立研究開発法人建築研究所, 国際地震工学センター, 上席研究員 (40360466)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | マグニチュード / 津波警報 |
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| Outline of Final Research Achievements |
We derived a set of the coefficients of the magnitude formula using high frequency seismic signal durations and maximum displacement amplitudes measured from regional data by a grid search approach. We showed that tsunami earthquakes were characterized by small displacement amplitudes and long high frequency seismic signal durations measured from regional data. We revised a set of the magnitude formula coefficients for tele-seismic data. We measured strong motion durations and maximum displacement amplitudes. Their products with epicentral distances show a good correlation with moment magnitudes. We developed a method to determine the end point of rupture using high frequency seismic signal durations from tele-seismic data.
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Report
(5 results)
Research Products
(9 results)
