Seismological Study in the Southern Eurasian Collision Zone

欧亚南部碰撞带地震学研究

• 批准号: 9304652
• 负责人: Fumiko Tajima
• 金额: $ 14.87万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1996-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304652&HistoricalAwards=false
• 关键词: Seismological; Study; Southern; Eurasian; Collision

This research involves a search for lithosphere and mantle downwelling beneath the Hindu Kush, Burma Arc, and southern Tibet by means of a residual sphere approach and 3-D finite difference calculation for theoretical travel times. Data will be collected from WWSSN, Canadian network and digital (IRIS/GSN, GEOSCOPE and GDSN) network data for earthquakes extending from the Hindu Kush eastward to Burma. Determination of differential residual spheres for pairs of events on the order of 400 km apart should test for the existence of a major downwelling proposed in the region by other scientists. For each group of differential spheres, indications of deep high velocity anomalies will be forward modeled using the finite difference scheme. The methods and results developed will have application to seismically active areas of proposed downwelling in the U.S. This research is a component of the National Earthquake Hazard Reduction Program.

这项研究包括寻找岩石圈和地幔 兴都库什山脉、缅甸弧和西藏南部的下降流 用剩余球法和三维有限差分法 计算理论旅行时间。 数据将被收集 来自WWSSN、加拿大网络和数字（IRIS/GSN、GEOSCOPE和 GDSN）网络数据的地震从兴都库什山脉延伸 向东到缅甸。 差示残球的测定 对于相隔400公里的成对事件， 该地区存在一个主要的下降流， 其他科学家。 对于每组微分球， 将对深部高速异常的指示进行正演模拟 使用有限差分格式。 的方法和结果 开发将应用于地震活跃地区， 这项研究是一个组成部分， 国家地震减灾计划。