[1]李 盛,胡久常,廖桂金,等.广西北流 — 广东化州 5.2 级地震前粤桂琼地区重力变化特征[J].华南地震,2020,40(02):50-59.[doi:10.13512/j.hndz.2020.02.08]
　LI Sheng,HU Jiuchang,LIAO Guijin,et al.The Characteristics of Gravity Variations in Guangdong,Guangxi and Hainan Regions before the Beiliu-Huazhou MS5.2 Earthquake in the Junction of Guangxi and Guangdong[J].South China journal of seismology,2020,40(02):50-59.[doi:10.13512/j.hndz.2020.02.08]
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广西北流 — 广东化州 5.2 级地震前粤桂琼地区重力变化特征()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2020年02期
页码:
50-59
栏目:
广西北流—广东化州5.2级地震专栏
出版日期:
2020-06-30

文章信息/Info

Title:
The Characteristics of Gravity Variations in Guangdong,Guangxi and Hainan Regions before the Beiliu-Huazhou MS5.2 Earthquake in the Junction of Guangxi and Guangdong
作者:
李 盛 1;  胡久常 1;  廖桂金 2;  王志成 1;  江 蕾 1
（ 1. 海南省地震局 , 海口 570203； 2. 广东省地震局 , 广州 510070）
Author(s):
LI Sheng1;  HU Jiuchang1;  LIAO Guijin2;  WANG Zhicheng1;  JIANG Lei1
(1.Hainan Earthquake Agency, Haikou 570203, China;2.Guangdong Earthquake Agency, Guangzhou 510070, China)
关键词:
地震; 峰值加速度; 强震动
Keywords:
Continuous gravity; Mobile gravity; Cumulative gravity change; Abnormal gravity change; Earthquak
分类号:
P315.7
DOI:
10.13512/j.hndz.2020.02.08
文献标志码:
A
摘要:
收集了粤桂琼地区 4 个台站的连续重力观测资料和雷琼地区的流动重力观测资料 , 研究了广西北流 —广东化州 5.2 级地震前粤桂琼地区重力变化特征。其中连续重力观测资料的分析从重力扰动和重力 M2 波潮汐因子变化两个方面进行；流动重力观测资料的分析从重力场差分动态和累积动态变化两个方面进行。连续重力观测资料的研究表明震前粤桂琼地区连续重力观测资料无异常现象；雷琼地区流动重力观测资料的研究结果表明 , 广西北流—广东化州 5.2 级地震前 , 震中附近地区存在重力场变化异常 , 异常持续时间约 2 年 ,正常范围约 100 km, 异常量级约 50x10-8m·s-2, 地震发生于重力场变化的高梯度带上。
Abstract:
This paper collected the continuous gravity observation data of 4 seismic stations in Guangdong,Guangxi and Hainan, and mobile gravity observation data in Leizhou-Hainan area, and studied the characteristics of gravity changes in the Guangdong, Guangxi and Hainan area before the Beiliu-Huazhou MS5.2 Earthquake. The analysis of continuous gravity observation data is carried out from two aspects of the gravity disturbance and the tide factor change of gravity M2 wave. The analysis of mobile gravity observation data is carried out from two aspects of the differential dynamics and cumulative dynamics of gravity field. The study of continuous gravity observation data shows that the continuous gravity observation data don’t have abnormal. The results of the mobile gravity data in Leizhou-Hainan show that before the Beiliu-Huazhou MS 5.2 earthquake, there was an abnormal change in the gravity field near the epicenter. The anomaly lasted about 2 years,of which the range was about 100 km and the magnitude was about 50x10-8m·s-2, and the earthquake occurred on the high gradient zone of gravity field change.

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备注/Memo

备注/Memo:
收稿日期 :2020-02-10 基金项目 :中国地震局震情跟踪定向工作任务（ 2019010202、 2020010213）；中国地震局监测、预报和科研三结合课题（ 3JH-201901038）；中国地震局地震科技星火计划（ XH21024Y）联合资助
更新日期/Last Update: 2020-08-11