Coupled Evolution of Earthquakes and Faults in a Rheologically-Layered Half-Space

流变分层半空间中地震和断层的耦合演化

• 批准号: 9725358
• 负责人: Yehuda Ben-Zion
• 金额: $ 14.01万
• 依托单位: University of Southern California
• 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: 1998-01-15 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725358&HistoricalAwards=false
• 关键词: Coupled; Evolution; Earthquakes; Faults; Rheologically

9725358 Ben-Zion This research involves the study of the simultaneous evolution of regional seismicity, aseismic deformation, and the network of fault systems sustaining the deformation in a continuation of prior 3-D simulations. The goal is to establish a physical basis for understanding spatio-temporal patterns of regional earthquakes, and the interrelations between different modes of deformation, structural properties of faults, and rheological properties of the brittle crust and its ductile surroundings. The work will employ a model incorporating deformation- and time-dependent damage rheology in a structure consisting of a layered elastic/viscoelastic half- space. The work will attempt to map in parameter space the basic types of crustal response that are possible for different structural and rheological properties, understand the essential characteristics of the different responses, and examine the possibility of earthquake prediction based on seismicity patterns. This research is a component of the National Earthquake Hazard Reduction Program. ***

9725358 Ben-Zion 这项研究涉及区域地震活动、地震变形以及在先前 3-D 模拟的延续中维持变形的断层系统网络的同步演化研究。 目标是为理解区域地震的时空模式、不同变形模式、断层结构特性以及脆性地壳及其延性周围环境的流变特性之间的相互关系建立物理基础。 这项工作将采用一种模型，将变形和时间相关的损伤流变学纳入由分层弹性/粘弹性半空间组成的结构中。 这项工作将尝试在参数空间中绘制不同结构和流变特性可能发生的地壳响应的基本类型，了解不同响应的基本特征，并研究基于地震活动模式进行地震预测的可能性。 这项研究是国家地震减灾计划的一部分。 ***