The U.S./China Joint Research on the Variation of Gravity and the Occurrence of Earthquakes in the BTTZ Region, P.R.C.

中美两国BTTZ地区重力变化与地震发生联合研究

• 批准号: 8916727
• 负责人: John Kuo
• 金额: $ 5万
• 依托单位: Columbia University Lamont Doherty Earth Observatory
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8916727&HistoricalAwards=false
• 关键词: U.S.; China; Joint; Research; Variation

This research is to provide the U.S. component of a joint US/PRC project to monitor gravity changes in the Beijing-Tianjin- Tangshan-Zhangjiakon (BTTZ) region of China. Gravity can be sensitive to tectonic distortion that causes density changes and elevation changes at a station, but effects of ground water elevation changes must be accounted for where stations cannot be situated on low-porosity crystalline rock. None of the latter station types are available in the BTTZ region. Therefore, a component of this research is to separate the ground-water variations and to investigate their relation to earthquakes which may be an important source of earthquake precursor information in themselves. This research is a contribution to the National Earthquake Hazard Reduction Program.

这项研究是为了提供美国/中国联合项目的美国部分，以监测中国北京-天津-唐山-张家康（BTTZ）地区的重力变化。重力对构造变形很敏感，构造变形会导致站点的密度变化和高程变化，但如果站点不能位于低孔隙度的结晶岩石上，则必须考虑地下水高程变化的影响。后一种电台类型在BTTZ区域都不可用。因此，这项研究的一个组成部分是分离地下水变化并研究它们与地震的关系，这些变化本身可能是地震前兆信息的重要来源。这项研究是对国家减少地震危害计划的贡献。