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《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:

期数:

2025年04期

页码:

658-664

栏目:

重力场及其变化观测与地球科学应用专辑

出版日期:

2025-05-01

文章信息/Info

Title:

Evaluation of the Data Quality of the Time-varying Gravity Field Source in Liaoning

作者:

翟丽娜¹; 2; 刘华建³; 黄江培⁴; 李彤霞¹; 杨牧萍¹; 李宇彤¹; 底欣欣¹

(1.辽宁省地震局,辽宁 沈阳 110034; 2.吉林大学 地球探测科学与技术学院,吉林 长春 110000; 3.辽宁省矿产勘查总院,辽宁 沈阳 110034; 4.云南省地震局,云南 昆明 650224)

Author(s):

ZHAI Lina¹; 2; LIU Huajian³; HUANG Jiangpei⁴; LI Tongxia¹; YANG Muping¹; LI Yutong¹; DI Xinxin¹

(1.Liaoning Earthquake Agency,Shenyang 110034,Liaoning,China)(2.Geoexploration Science and Technology College,Jilin University,Changchun 110000,Jilin,China)(3.General Hospital of mineral exploration of Liaoning Province,Shenyang 110034,Liaoning,China)(4.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)

关键词:

重力监测;  地壳形变;  贝叶斯重力平差;  时变重力信号

Keywords:

gravity observation;  Crustal deformation;  Bayesian gravity adjustment;  time-varying gravity signals

分类号:

P312.1

DOI:

10.20015/j.cnki.ISSN1000-0666.2025.0067

摘要:

针对流动重力观测过程中存在的仪器不确定性导致观测数据质量的问题,收集2015—2018年辽宁地区的6期时变重力观测数据,分别采用贝叶斯分析方法和经典最小二乘平差方法,计算相对重力仪的漂移率和格值系数,对重力观测数据进行精度分析; 使用2021年5月—2022年5月重力数据分析辽宁地区地下介质活动性。结果表明:经典平差方法和贝叶斯平差方法对于拉科斯特型号重力仪器漂移率解算结果是一致的,贝叶斯方法可有效抑制仪器误差; 辽宁地区重力测网多年测量结果满足地震重力分析需求。辽宁地区整体重力变化较为平稳,表明地下介质活动较弱,断裂活动稳定。重力变化起伏较大的区域4级地震较为频繁。

Abstract:

In order to solve the problem of the gravimeter's uncertainty affecting the quality of the data from mobile gravity observation,the relative gravimeter's drift rate and scale coefficient were calculated by using the Bayesian analysis method and the classical least squares adjustment method,and the precision of gravity observation data were analyzed based on the 6 periods of time-variable gravity observation data collected in Liaoning from 2015 to 2018.Analysis of the gravity data observed in Liaoning from May 2021 to May 2022 will help to explain the gravity field changes,and analyze the relationship between the material change and the gravity field changes in Liaoning. The results show that the drift rates of the LaCoste gravimeter calculated respectively with the classical adjustment method and the Bayesian adjustment method are consistent, and the Bayesian method can effectively suppress instrument errors. The long-term measurements from the gravimetric network in Liaoning Province meet the need of seismic analysis. The overall gravity change in Liaoning Province is relatively steady, indicating the weak activity of underground media and the stable faults in this region. Areas with significant gravity fluctuation experienced frequent 4-magnitude earthquakes.

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备注/Memo

备注/Memo:

收稿日期:2024-10-31.
基金项目:中国地震局震情跟踪面上任务(2024020203,CEA-ZQGZ-20252005); 中国地震局震情跟踪青年任务(2023010202); 云南省地震局地震科技专项(2024ZX03).
第一作者简介:翟丽娜(1986-),高级工程师,主要从事重力学与地球动力学等方面研究.E-mail:529436296@qq.com.
通信作者简介:刘华建(1987-),高级工程师,主要从事地球物理勘查与管线网络探测方面研究.E-mail:2902

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更新日期/Last Update: 2025-05-01