Numerical modeling of earthquake dynamic rupture; requirements for realistic modeling
Numerical modeling of earthquake dynamic rupture; requirements for realistic modeling
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发表时间：
2003-01
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通讯作者：
E. Fukuyama
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作者：
E. Fukuyama
我提出了一个策略，使数值计算适用于地震动态破裂过程的真实模拟。要做到这一点，重要的是要引入任何可观的模拟作为初始和边界条件。作为初始条件，必须给出动态破裂前的总应力分布;作为边界条件，必须给出断层的本构关系和几何形状。初始应力分布可以通过现场应力测量和震源机制解的应力张量反演得到。本构参数可以通过近断层地震波观测得到。精确的断层几何形状可以通过精确的地震活动重新定位以及地质调查来获得。只有综合上述观测结果，才能对地震的动态破裂进行真实的模拟。
I propose a strategy to make a numerical computation applicable to the realistic modeling of an earthquake dynamic rupture process. To do this, it is important to introduce any observables into the simulation as initial and boundary conditions. As an initial condition, distribution of total stress before the dynamic rupture, and as boundary conditions, fault constitutive relation and geometry of the fault are necessary. The initial stress distribution would be obtained by both in-situ measurements of stress and stress tensor inversions of earthquake focal mechanisms. Constitutive parameters could be obtained by near fault observations of seismic waves. Precise fault geometry can be obtained by an accurate relocation of seismicity as well as geological survey. Realistic simulations of a dynamic rupture of an earthquake can only be done by integrating the above observations.