Is earthquake triggering driven by small earthquakes?
Is earthquake triggering driven by small earthquakes?
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DOI：
10.1103/physrevlett.91.058501
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发表时间：
2003-08-01
影响因子：
8.6
通讯作者：
Helmstetter, A
中科院分区：
文献类型：
--
作者：
Helmstetter, A
利用南加州的地震活动目录，我们测量了触发地震的次数是如何随着地震震级的增加而增加的。这种关系与地震震级分布之间的权衡控制了小地震与大地震的相对作用。我们表明，地震活动的触发是由最小的地震驱动的，这些地震触发的事件比大地震少，但大地震的数量要多得多。我们提出触发地震次数的非平凡标度来自地震活动性的分形空间分布。
Using a catalog of seismicity for Southern California, we measure how the number of triggered earthquakes increases with the earthquake magnitude. The trade-off between this relation and the distribution of earthquake magnitudes controls the relative role of small compared to large earthquakes. We show that seismicity triggering is driven by the smallest earthquakes, which trigger fewer events than larger earthquakes, but which are much more numerous. We propose that the nontrivial scaling of the number of triggered earthquakes emerges from the fractal spatial distribution of seismicity.