Parametrizing Physics-Based Earthquake Simulations
Parametrizing Physics-Based Earthquake Simulations
复制标题
基于物理的地震模拟参数化
DOI：
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发表时间：
2017
影响因子：
2
通讯作者：
D. Turcotte
中科院分区：
文献类型：
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作者：
Kasey W. Schultz;M. Yoder;John M. Wilson;E. Heien;M. Sachs;J. Rundle;D. Turcotte
利用震源参数的比例关系，我们制定了一个可扩展的滑动弱化摩擦准静态地震模拟的法律。该算法基于用于生成断层强度的方法，该方法用于最近对加州断层系统进行的地震模拟器比较研究。重点介绍了该算法在虚拟地震模拟器中的应用。作为一个案例研究，我们探讨的摩擦法的参数对模拟地震率的UCERF 3加州断层模型的影响，并提出由此产生的条件概率为加州地震的情况。新的摩擦模型显着扩展了矩震级范围内，模拟地震率匹配观测率在加州，以及大幅提高模拟和观测的比例关系之间的协议，平均滑动和总破裂面积。
Utilizing earthquake source parameter scaling relations, we formulate an extensible slip weakening friction law for quasi-static earthquake simulations. This algorithm is based on the method used to generate fault strengths for a recent earthquake simulator comparison study of the California fault system. Here we focus on the application of this algorithm in the Virtual Quake earthquake simulator. As a case study we probe the effects of the friction law’s parameters on simulated earthquake rates for the UCERF3 California fault model, and present the resulting conditional probabilities for California earthquake scenarios. The new friction model significantly extends the moment magnitude range over which simulated earthquake rates match observed rates in California, as well as substantially improving the agreement between simulated and observed scaling relations for mean slip and total rupture area.