Investigation of excitation sources of Earth's background free oscillations from acoustic resonance
Project/Area Number |
19740268
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Single-year Grants |
Research Field |
Solid earth and planetary physics
|
Research Institution | The University of Tokyo |
Principal Investigator |
NISHIDA Kiwamu The University of Tokyo, 地震研究所, 助教 (10345176)
|
Project Period (FY) |
2007 – 2009
|
Project Status |
Completed (Fiscal Year 2009)
|
Budget Amount *help |
¥2,920,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥1,100,000 (Direct Cost: ¥1,100,000)
|
Keywords | 地球自由振動 / 大気音波 / 音波 / 大気自由振動 / 音響結合 / 常時地球自由振動 / 大気圧観測 / 表面波 |
Research Abstract |
In this study we showed clear evidence of background Love waves from 10 to 20 mHz. The observed kinetic energy of Love waves is as large as that of Rayleigh waves through the whole period of analysis. We propose that the most likely excitation source is shear traction acting on a sea-bottom horizon due to linear topographic coupling of infragravity waves.
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Report
(4 results)
Research Products
(18 results)