Seismic Velocity and Attenuation Structures of the Earth's Inner and Outer Core

地球内外核的地震速度和衰减结构

• 批准号: 0207746
• 负责人: Lianxing Wen
• 金额: $ 6.28万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0207746&HistoricalAwards=false
• 关键词: Seismic; Velocity; Attenuation; Structures; Earth

WENEAR-0207746The PI proposes a study of seismic velocity and attenuation structures for both the Earth's inner and outer core and their implications for mineral physics and dynamics. The seismic structures will be studied based on the differential travel times and waveforms of various PKP branches collected from the global and regional seismic networks. Seismic studies will be performed for the "eastern" and "western" hemispheres respectively, and in two steps: 1) establish two one-dimensional seismic velocity and attenuation models of the Earth's inner and outer core for the PKP phases sampling equatorial paths; and, 2) constrain anisotropy magnitudes and transitions from a possible top isotropic layer to deep anisotropy in the inner core.

PI提出了一项研究地球内核和外核的地震速度和衰减结构及其对矿物物理学和动力学的影响。将根据从全球和区域地震台网收集的PKP各分支的差走时和波形研究地震结构。将分别对“东”半球和“西”半球进行地震研究，分两步进行：1）建立地球内核和外核的两个一维地震速度和衰减模型，用于PKP相位采样赤道路径; 2）限制各向异性幅度和从可能的顶部各向同性层到内核深层各向异性的过渡。