Time-dependent analysis of aftershock events and structural impacts on intraplate crustal seismicity of the Van earthquake (Mw 7.1, 23 October 2011), E-Anatolia
Time-dependent analysis of aftershock events and structural impacts on intraplate crustal seismicity of the Van earthquake (Mw 7.1, 23 October 2011), E-Anatolia
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凡地震余震事件和结构对板内地壳地震活动影响的时间相关分析（Mw 7.1，2011 年 10 月 23 日），E-Anatolia
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Toker
中科院分区：
文献类型：
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作者：
M. Toker
安纳托利亚东部凡地震（MW 7.1，2011年10月23日）是板内地震的典型代表。由于其多重分形动力的复杂性和不均匀的压缩性质，其逆冲震源特征和余震地震活动模式表明了土耳其各地有史以来最突出的复合地震类型。余震的地震活动模式在其排列的聚类事件的总体特征上似乎总是很复杂。余震事件的数量和分布清楚地表现出空间变异性、聚类-分散性和间歇性，与多重分形尺度一致。时间尺度内事件的连续增长显示了震源区地震活动的多重分形行为。结果表明，广泛的异质性和随时间变化的强度被认为是产生不同余震事件的原因。这些因素对板内地震活动具有结构性影响，表明范事件的多重分形和不稳定性质。多重分形地震活动受地壳尺度断层、力学非均质性和地震变形各向异性的复杂演化控制。余震的整体地震活动模式提供了应变软化过程的机制来解释凡地震中的主要逆冲事件。断层弱化应变局部化控制了凡地震的地震特征，有助于解释余震的异常发生和凡地震的板内性质。
The Van earthquake (MW 7.1, 23 October 2011) in E-Anatolia is typical representative of intraplate earthquakes. Its thrust focal character and aftershock seismicity pattern indicate the most prominent type of compound earthquakes due to its multifractal dynamic complexity and uneven compressional nature, ever seen all over Turkey. Seismicity pattern of aftershocks appears to be invariably complex in its overall characteristics of aligned clustering events. The population and distribution of the aftershock events clearly exhibit spatial variability, clustering-declustering and intermittency, consistent with multifractal scaling. The sequential growth of events during time scale shows multifractal behavior of seismicity in the focal zone. The results indicate that the extensive heterogeneity and time-dependent strength are considered to generate distinct aftershock events. These factors have structural impacts on intraplate seismicity, suggesting multifractal and unstable nature of the Van event. Multifractal seismicity is controlled by complex evolution of crustal-scale faulting, mechanical heterogeneity and seismic deformation anisotropy. Overall seismicity pattern of aftershocks provides the mechanism for strain softening process to explain the principal thrusting event in the Van earthquake. Strain localization with fault weakening controls the seismic characterization of Van earthquake and contributes to explain the anomalous occurrence of aftershocks and intraplate nature of the Van earthquake.
根据高分辨率地震调查重建凡湖（土耳其东部）的沉积演化
影响因子：
2.3
作者：
Krastel;Demirel-Schlüter;Demirbag;Niessen
通讯作者：
Niessen