Improved Estimates of the Rotation Rate of the Earth's Inner Core
Improved Estimates of the Rotation Rate of the Earth's Inner Core
批准号:
9805245
负责人:
Paul Richards
金额:
$15.0万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1998
资助国家:
美国
项目状态:
已结题
起止时间:
1998-07-15 至 2001-06-30
中文摘要
[805245]理查兹这项研究包括努力改进对地心相对于固体地球其余部分的旋转速率的估计。这个项目是原始研究的延续,导致了内核超旋转的发现。在147-155度的临界距离范围内,寻找地球南北自转轴与固体内核内的射线之间夹角小于40度的路径,以寻找更多的地震记录。将在临界距离区域进行另一次地震偶波搜索。双重态具有相同的波型,因此可用于高精度差分走时测量。将进行建模以研究产生观测到的低振幅PKIKP早期到达的结构范围,这些结构与靠近内核快速轴的射线路径有关。
英文摘要
9805245RichardsThis research involves efforts to improve estimates of the inner core's rate of rotation with respect to the rest of the solid Earth. This project is a continuation of the original research that led to the discovery the inner core super rotation. A search will be made for more seismograms in the critical distance range of 147-155 degrees for paths making an angle less than about 40 degrees between the Earth's north-south spin axis and the ray within the solid inner core. Another search will be made for earthquake doublets in the critical distance regions. Doublets have identical wave patterns and can therefore be used to give high-precision differential travel-time measurements. Modeling will be done to investigate the range of structures that produce observed, low-amplitude PKIKP early arrivals associated with ray paths close to the fast axis in the inner core.
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会议论文
Study of Inner Core Motions using Seismic Waveform Doublets
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批准号:0510641
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项目类别:Standard Grant
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资助金额:$22.5万
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财政年份:2005
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负责人:Paul Richards
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依托单位:
Planar-Antenna-coupled Superconducting Bolometer Arrays for Submillimeter and Millimeter Astrophysics
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批准号:0352992
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项目类别:Continuing Grant
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资助金额:$53.98万
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财政年份:2004
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负责人:Paul Richards
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依托单位:
Two Searches for Observational Evidence of Inner Core Rotation
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批准号:0125691
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项目类别:Standard Grant
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资助金额:$12.0万
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财政年份:2002
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负责人:Paul Richards
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依托单位:
Superconducting Bolometer Arrays for Far-Infrared and Millimeter-wave Astrophysics
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批准号:0096933
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项目类别:Continuing Grant
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资助金额:$54.39万
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财政年份:2001
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负责人:Paul Richards
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依托单位:
Voltage-Biased Superconducting Bolometers For Far Infrared and Millimeter-Wave Astrophysics
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批准号:9731200
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项目类别:Continuing Grant
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资助金额:$51.15万
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财政年份:1998
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负责人:Paul Richards
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依托单位:
Analytic Studies of Seismic Waves in 3-D Structures
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批准号:8708564
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项目类别:Continuing Grant
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资助金额:$10.0万
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财政年份:1987
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负责人:Paul Richards
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依托单位:
Numerical Studies of Attenuating Seismic Waves
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批准号:8608288
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项目类别:Continuing grant
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资助金额:$0.0万
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财政年份:1986
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负责人:Paul Richards
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依托单位:
Rocket-Borne Radiometry of the Submillimeter Diffuse Astrophysical Background
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批准号:8312055
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项目类别:Standard Grant
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资助金额:$2.27万
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财政年份:1984
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负责人:Paul Richards
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依托单位:
Quantitative Studies of High Frequency Strong Ground Motion
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批准号:8023170
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项目类别:Continuing grant
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资助金额:$0.0万
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财政年份:1981
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负责人:Paul Richards
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依托单位:
Fundamental Studies of Spontaneous Earthquake Faulting Models
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批准号:8007426
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项目类别:Continuing grant
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资助金额:$0.0万
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财政年份:1980
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负责人:Paul Richards
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依托单位:
Crack Propagation in 3-Dimensions
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批准号:7901810
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1979
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负责人:Paul Richards
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依托单位:
Investigations of Crustal and Upper Mantle Structure, Using Quasi-Guided Waves/Quasi-Body Waves
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批准号:7714481
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1978
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负责人:Paul Richards
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依托单位:
A Multi-Mode Surface Wave Study of Lateral Heterogeneities Relating to Structure and Flow Within the Oceanic Upper Mantle.
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批准号:7521788
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项目类别:Continuing Grant
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资助金额:$7.4万
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财政年份:1976
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负责人:Paul Richards
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依托单位:
Fundamental Investigations of Seismic Body Waves
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批准号:7613136
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1976
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负责人:Paul Richards
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依托单位:
Investigation of Pulse Deformation in Seismic Body Waves
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批准号:7201486
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1972
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负责人:Paul Richards
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依托单位:
海外基金