张素欣,孙丽娜,李永庆,等. 2019年12月5日河北唐山M4.5地震的发震背景[J]. 华北地震科学,2020, 38(S1):76-79. doi:10.3969/j.issn.1003−1375.2020.S1.017.
引用本文: 张素欣,孙丽娜,李永庆,等. 2019年12月5日河北唐山M4.5地震的发震背景[J]. 华北地震科学,2020, 38(S1):76-79. doi:10.3969/j.issn.1003−1375.2020.S1.017.
ZHANG Suxin,SUN Lina,LI Yongqing,et al. The Seismogenic Background of the M4.5 Earthquake in Hebei Tangshan on December 5, 2019[J]. North China Earthquake Sciences,2020, 38(S1):76-79. doi:10.3969/j.issn.1003−1375.2020.S1.017.
Citation: ZHANG Suxin,SUN Lina,LI Yongqing,et al. The Seismogenic Background of the M4.5 Earthquake in Hebei Tangshan on December 5, 2019[J]. North China Earthquake Sciences,2020, 38(S1):76-79. doi:10.3969/j.issn.1003−1375.2020.S1.017.

2019年12月5日河北唐山M4.5地震的发震背景

The Seismogenic Background of the M4.5 Earthquake in Hebei Tangshan on December 5, 2019

  • 摘要: 2019年12月5日在唐山老震区4.5级以上地震平静7年半的背景下,丰南发生了4.5级地震,该地震震中位于1976年宁河M 6.9地震余震区的边缘,构造上位于唐山断裂带中的唐山-丰南活动断裂与蓟运河活动断裂以及宁河-昌黎弱活动断裂的交汇部位。根据构造特征、余震活动时空图像、震源机制资料,综合分析此次地震的发震背景及指示意义。

     

    Abstract: On December 5, 2019, an M4.5 earthquake occurred in Tangshan Fengnan, the earthqe broke the M4.5 earthquake quiescence that had last for seven and a half years. The earthquake epicenter is located in the edge of the aftershocks of 1976 Ninghe M6.9 earthquake. Its epicenter located in the intersection part of Fengnan active faults, Jiyunhe active faults and the Ninghe -Changli active fault. Based on the structural features, the spatial and temporal images of aftershocks, and the focal mechanism data, this paper comprehensively analyzes the seismogenic background and indicative significance of the earthquake.

     

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