2016年唐山开平<i>M</i><sub>L</sub>4.7地震活动性分析

张盛中; 王同利; 崔博闻; 乔永军; 马胜男

doi:10.11899/zzfy20230313

2016年唐山开平M_L4.7地震活动性分析

doi: 10.11899/zzfy20230313

1.
中国地质大学（北京）, 信息网络与数据中心, 北京 100083
2.
北京市地震局, 北京 100081
3.
中国地质大学（北京）, 地球物理与信息技术学院, 北京 100083

基金项目: 北京市自然基金项目（XH21001）

详细信息

作者简介:
张盛中，男，生于1973年。硕士，工程师。从事地震工程和网络安全工作。E-mail：zhsz@cugb.edu.cn

通讯作者:
王同利，女，生于1973年。硕士，正研级高级工程师。主要从事地震活动性和地震监测、预报研究工作。E-mail：416991552@qq.com

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出版历程
- 收稿日期: 2023-06-21
- 刊出日期: 2023-08-31

Seismic Activity Analysis of M_L4.7 in Kaiping, Tangshan in 2016

1.
Information Network and Data Center, China University of Geosciences, Beijing 100083, China
2.
Beijing Seismological Bureau, Beijing 100081, China
3.
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China

摘要

摘要: 2016年8月至2016年10月唐山余震区小震活动增强，尤其是8月21日至9月22日期间，其中9月10日发生震级最大地震为唐山开平M_L4.7地震。为了解中强地震发震特征及地震序列变化，基于模板匹配定位识别技术，利用2016年8月1日至2016年10月31日连续波形进行唐山开平地震前后微震检测和定位。从研究区域内中国地震台网目录中选择283个地震事件作为模板事件，基于连续波形共检测识别出878个地震事件，其数量约为模板事件的3倍，约为中国地震台网目录的1.4倍，检测后的地震目录完备震级由原来的M_L0.2 提升至M_L−0.1。利用双差定位方法对847个地震事件进行重定位，结果显示震中附近小震活动频繁，且在唐山开平地震震中周边分布较集中。分析震群分布特征认为唐山开平地震属于唐山老震区正常地震活动，发震断层为唐山-古冶断裂的可能性较大。
- 地震活动 /
- 模板匹配 /
- 检测 /
- 定位 /
- 完备震级
Abstract: From August to October, 2016, small seismic activity increased in Tangshan, especially from August 21 to September 22, The largest earthquake was a magnitude of M_L4.7 seismic in Kaiping on September 10. In this paper, based on the continuous seismic data between August 1, 2016 and October 31, 2016 recorded by 37 seismic stations, we utilize the graphics processing unit based match & locate technology (be called GPU M&L) and double difference location algorithm methods(be called HypoDD) to study the microseismical sequence of the Kaiping M_L4.7. Firstly, 283 seismic were selected as template from those seismic events provided by the China Earthquake Network Center. Secondly, we detected the 878 seismic events with GPU M&L, which are 3 times more than the template and 1.4 times more than the recorded by the China Earthquake Network Center, the complete magnitude of the seismic catalog decreases from M_L0.2 of the network catalog to M_L−0.1. Finally, 847 seismic events were accurately relocated using HypoDD, showing the activity of small seismic near the epicenter more strongly and the distribution more concentrated. According to the distribution of seismic groups, the Kaiping M_L4.7 belongs to the normal seismic activity in the Tangshan and the seismogenic fault is the Tangshan- Guye fault.
- Seismic activity /
- Template matching /
- Detection /
- Locate technology /
- Complete magnitude

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图 1 地震周边构造背景及观测站（点）分布

Figure 1. Geological structure surrounding the epicenter and distribution of observation point

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图 2 研究区域2016年8月至2016年10月台网地震目录序列与空间分布

Figure 2. Sequence and spatial distribution of network catalog from August to October 2016

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图 3 检测地震目录数量-震级分析

Figure 3. The magnitude-number of catalogs after detection

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图 4 台网目录和检测地震目录b值拟合分析

Figure 4. Statistical catalogs analysis of b value between the network and the detection

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图 5 重定位后地震事件分布

Figure 5. Distribution of detection earthquake

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图 6 检测地震事件震源空间分布

Figure 6. Source spatial distribution of detection seismic

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图 7 检测地震事件时序分布

Figure 7. Time serials distribution of detection seismic

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