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首页> 外文期刊>Pure and Applied Geophysics >Seismotectonic Properties and Zonation of the Far-Eastern Eurasian Plate Around the Korean Peninsula
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Seismotectonic Properties and Zonation of the Far-Eastern Eurasian Plate Around the Korean Peninsula

机译：朝鲜半岛东部远东欧亚板块的地震构造特征与区划

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Regional seismotectonics provides crucial information for seismic hazard analysis, which is difficult to address with short-term earthquake records. The far-eastern Eurasian plate around the Korean Peninsula presents a stable intraplate environment with diffuse seismicity, of which responsible tectonics and active faults are difficult to identify. Combined analysis of instrumental and historical earthquake records is required for assessment of long-term seismicity properties. Seismotectonic provinces are identified from the spatial distribution of seismicity properties controlled by the medium properties and stress field. The boundaries of the seismotectonic provinces are defined considering the medium properties that can be inferred from geological, geophysical and tectonic features. The Gutenberg-Richter frequency-magnitude relationships and maximum magnitudes for the seismotectonic provinces are determined using instrumental and historical earthquake records. The validity of maximum magnitude estimation is tested with synthetic data. A parametric method, the Tate-Pisarenko method, produces more accurate estimates than non-parametric methods. A modified Tate-Pisarenko method is proposed for estimation of maximum magnitudes for incomplete short-term earthquake catalogs. The maximum magnitude of events for the whole region is approximately the same as the average of the maximum magnitudes of events for subdivided provinces, causing apparent variation in maximum magnitudes depending on the number of seismotectonic provinces. Consideration of a reasonable number of seismotectonic provinces may be needed for proper assessment of seismic hazard potentials is recommended. The combined analysis of historical and instrumental earthquake records suggests maximum magnitudes greater than 7 around the peninsula.
机译：区域地震构造为地震危险性分析提供了重要信息，而短期地震记录很难解决这一问题。朝鲜半岛周围的远东欧亚板块呈现出稳定的板内环境，地震活动散布，难以识别负责任的构造和活动断层。需要对仪器和历史地震记录进行综合分析，以评估长期地震活动性。地震构造省份是根据受介质特性和应力场控制的地震特性的空间分布来确定的。考虑到可以从地质，地球物理和构造特征推断出的介质特性来定义地震构造省份的边界。地震构造省份的古腾堡-里希特频率-振幅关系和最大震级使用仪器和历史地震记录来确定。最大幅度估计的有效性通过综合数据进行了测试。参数方法（Tate-Pisarenko方法）比非参数方法产生更准确的估计。提出了一种改进的Tate-Pisarenko方法，用于估计不完整的短期地震目录的最大震级。整个区域的最大事件强度与细分省份的最大事件强度的平均值大致相同，从而导致最大强度的明显变化取决于地震构造省份的数量。建议适当考虑地震构造省份，以正确评估地震危险性。对历史和仪器地震记录的综合分析表明，半岛周围的最大震级大于7。

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