Global Studies of Seismicity and Deformation at Convergent Margins Due to Heterogeneous Coupling

非均质耦合引起的收敛边缘地震活动和变形的全球研究

• 批准号: 9805182
• 负责人: James Rice
• 金额: $ 13.5万
• 依托单位: Harvard University
• 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
• 起止时间: 1998-07-15 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9805182&HistoricalAwards=false
• 关键词: Global; Studies; Seismicity; Deformation; Convergent

9614431Rice This research involves a continuation of the study of seismicity in coupled subduction segments and their surroundings (overriding plate, sea floor and subducting slab) to understand the strength and heterogeneity of coupling along the thrust interface. Specific areas of investigation are: 1) investigation of the relations between heterogeneous seismic coupling along the main thrust zone and seismicity in the sea floor and upper plate areas; 2) explanation of seismicity in the descending slab at intermediate depths and its relation to coupling; 3) correlation of seismicity with changes in a Coulomb measure of stress change (shear minus friction coefficient times normal stress change) in a subduction zone and its vicinity; and 4) investigation of compressional earthquakes in zones near the trench and towards the outer rise as signals of the maturity of the earthquake cycle of the thrust interface. This research is a component of the National Earthquake Hazard Reduction Program.

9614431赖斯这项研究涉及继续研究耦合俯冲段及其周围（覆盖板块，海底和俯冲板）的地震活动性，以了解耦合的强度和不均匀性沿着逆冲界面。 具体的研究领域是：1）沿主冲断带沿着的非均匀地震耦合与海底和上板块区地震活动之间的关系的研究; 2）解释中间深度下降板块的地震活动及其与耦合的关系; 3）地震活动性与应力变化的库仑测量变化的相关性（剪切减摩擦系数乘以法向应力变化）; 4）调查海沟附近和朝向外部隆起的区域的挤压地震，作为逆冲界面地震周期成熟的信号。 这项研究是国家地震减灾计划的一个组成部分。