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

9614431Rice 这项研究涉及对耦合俯冲段及其周围环境（上覆板块、海底和俯冲板片）地震活动的继续研究，以了解沿逆冲界面耦合的强度和非均质性。 具体研究领域为：1）沿主冲断带非均质地震耦合与海底和上部板块区域地震活动关系的研究； 2）解释中深度下降板片的地震活动及其与耦合的关系； 3) 俯冲带及其附近地区地震活动与应力变化的库仑测量（剪切减去摩擦系数乘以法向应力变化）的变化的相关性； 4) 调查海沟附近和外隆起区域的压缩地震，作为逆冲界面地震周期成熟度的信号。 这项研究是国家地震减灾计划的一部分。

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.