地震强度分布不均匀性的摩擦时间依从CA模型

Application of the friction time-dependent cellular automaton model of seismicity to the study of heterogeneity of intensity distribution of earthquakes

设计一个摩擦时间依从的地震活动性细胞自动机模型 (CA) ,研究产生地震累积频度 -震级关系曲线中 ,出现拐点的地震强度分布不均匀现象的物理原因。外界通过应力加载向模型输入能量 ,模型的细胞之间存在非线性的相互作用。对比分析规定单个细胞破裂与模型地震之间不同的决定规则时产生的地震序列的累积频度 -震级关系 ,研究结果表明 ,地震的级联破裂方式是引起累积频度

In this paper, a friction time dependent cellular automaton model of seismicity is designed to study the phenomena of the heterogeneity of intensity distribution of earthquakes, which is displayed by that some accumulative frequency magnitude relation curves of earthquakes have a breaking point. Energy is put into the model by loading from outside and there is nonlinear interaction among cells. The accumulative frequency magnitude relations produced under different rules of the breaking of single cell and the breaking behave of earthquakes are analyzed. The result shows that the cascade breaking way of earthquakes is one of the causes that produce the heterogeneity of accumulative frequency magnitude relation in lower magnitude and higher magnitude range.