Global Positioning System (GPS) Constraints on Inter-Plate and Intra-Plate Deformation of the Indian Subcontinent

全球定位系统（GPS）对印度次大陆板间和板内变形的约束

• 批准号: 0003449
• 负责人: Roger Bilham
• 金额: $ 65.6万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003449&HistoricalAwards=false
• 关键词: Global; Positioning; System; GPS; Constraints

Bilham 0003449 This is a five-year collaboration with Indian scientists (Bangalore, Bombay and Wadia Institute) to unravel the details of movement and deformation of the Indian plate. The investigators expect to constrain the rotation rate of India, the rate of change of convergence velocity along the Himalayan arc, and some of the details of giant earthquakes that have ruptured there in the past two centuries using Global Positioning System geodesy. Geodetic measurements within India will reveal the rate at which the Indian plate is deforming and provide insights into the rate of occurrence, and possible location, of future mid-plate earthquakes. The recent Bhuj M=7.6 earthquake whose study has been initiated as part of this project, has many similarities to the infrequent great mid-plate earthquakes that afflicted North America in the early 19th century. Seismic hazard findings from India are thus likely not only to benefit mid-21st-century India, when it will be the most populous country in the world, but also the USA, the country that has the most to lose economically from future mid-plate earthquakes. This work also includes measurements of absolute gravity, as well as maintenance and upgrade of the F5 absolute gravimeter. Additionally, startup funds from INT are included for collaboration with Pakistani colleagues at the University of Peshewar for a geodynamic study of the western edge of the Indian Plate.

这是一项与印度科学家（班加罗尔、孟买和瓦迪亚研究所）为期五年的合作，旨在揭开印度板块运动和变形的细节。研究人员希望利用全球定位系统（gps）的大地测量技术，来限制印度的自转速度、喜马拉雅弧形带的辐合速度变动率，以及过去两个世纪发生在那里的大地震的一些细节。印度境内的大地测量将揭示印度板块变形的速度，并为未来板块中间地震的发生速度和可能的位置提供洞见。最近的Bhuj M=7.6级地震的研究是该项目的一部分，它与19世纪初侵袭北美的罕见的大板块地震有许多相似之处。因此，来自印度的地震危险发现可能不仅有利于21世纪中期的印度，届时它将成为世界上人口最多的国家，而且也有利于美国，这个在未来中板块地震中经济损失最大的国家。这项工作还包括绝对重力的测量，以及F5绝对重力仪的维护和升级。此外，INT的启动资金还包括与白舍瓦大学的巴基斯坦同事合作进行印度板块西缘的地球动力学研究。