Earthquakes Within Earthquakes: Patterns in Rupture Complexity
Earthquakes Within Earthquakes: Patterns in Rupture Complexity
复制标题
地震中的地震：破裂复杂性模式
DOI：
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发表时间：
2019
影响因子：
5.2
通讯作者：
M. Denolle
中科院分区：
文献类型：
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作者：
Philippe Danré;Jiuxun Yin;B. Lipovsky;M. Denolle
震源时间函数携带着地震破裂复杂性的信息。我们研究了震源时间函数的数据库，发现它们是由我们称之为子事件的不同峰值组成的。我们观察到，地震的复杂性，所代表的子事件的数量，随着地震震级的增长。破裂复杂性的模式产生于次事件时刻和主事件时刻之间的比例关系。这些结果可以通过简单的二维动态破裂模拟与自仿射非均匀性断层预应力来解释。应用这一早期的震级估计，我们表明，主要事件的震级可以估计后，观察只有前几个subevents。
Earthquake source time functions carry information about the complexity of seismic rupture. We explore databases of earthquake source time functions and find that they are composed of distinct peaks that we call subevents. We observe that earthquake complexity, as represented by the number of subevents, grows with earthquake magnitude. Patterns in rupture complexity arise from a scaling between subevent moment and main event moment. These results can be explained by simple 2‐D dynamic rupture simulations with self‐affine heterogeneity in fault prestress. Applying this to early magnitude estimates, we show that the main event magnitude can be estimated after observing only the first few subevents.