辽宁地区时变重力场源变化特征分析

doi:10.12196/j.issn.1000-3274.2021.01.014

地震 ›› 2021, Vol. 41 ›› Issue (1): 180-190.doi: 10.12196/j.issn.1000-3274.2021.01.014

辽宁地区时变重力场源变化特征分析

贾晓东¹, 翟丽娜¹, 陈石^2,3

1.辽宁省地震局, 辽宁沈阳 100034;
2.中国地震局地球物理研究所, 北京 100081;
3.北京白家疃国家地球科学野外观测研究站, 北京 100095

收稿日期:2020-09-07 修回日期:2020-11-11 出版日期:2021-01-31 发布日期:2021-01-28
通讯作者: 陈石,研究员。E-mail:chenshi@cea-igp.ac.cn
作者简介:贾晓东(1980-),男,山东兖州人,高级工程师,主要从事地壳形变与地球动力学分析研究。
基金资助:
震情跟踪青年项目(2021010204); 星火计划青年项目(XH21013Y); 地震预测预警运维项目(2240505); 星火计划攻关项目(XH19059)

Analysis on the Characteristics of Time-varying Gravity Field Source Changes in Liaoning Area

JIA Xiao-dong¹, ZHAI Li-na¹, CHEN Shi^2,3

1. Liaoning Earthquake Agency, Shenyang 110034, China;
2. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
3. Beijing Baijiatuan Earth Science National Observation and Research Station, Beijing 100095, China

Received:2020-09-07 Revised:2020-11-11 Online:2021-01-31 Published:2021-01-28

摘要/Abstract

摘要： 地震重力分析通过研究时变重力场变化获取地球内部介质物性变化信息。采用贝叶斯重力网平差方法对辽宁地区2011—2014年共计四年7期的流动重力观测资料进行处理, 对研究区重力观测网总体监测能力做出分析, 选用欧拉反褶积对研究区的重力变化场源深度及空间分布特征进行反演和解释。通过反演计算发现, 在2013年灯塔M_S5.1地震前沈阳—辽阳地区重力变化较大, 形成高梯度带, 反映该地区地震活动性增强; 而欧拉反褶积计算反演地下介质场源深度在10~40 km, 与地震实际发生深度相符, 且集中在断裂带附近。本研究可为研究辽宁地区深部孕震环境特征提供一定参考。

关键词: 时变重力场, 贝叶斯重力网平差, 流动重力, 欧拉反褶积, 密度变化

Abstract: Seismic gravity analysis can be used to obtain the physical properties of the earth by studying the change of the time-varying gravity. In this paper, the Bayesian gravity network adjustment method is used to process the mobile gravity observation data for a total of 7 periods of four years in Liaoning from 2011 to 2014, evaluate and analyze the overall monitoring capability of the gravity observation network in the study area,and employ the Euler deconvolution method to inverse field source parameters,before the lighthouse M_S5.1 earthquake occurred in 2013. The results show that the gravity in the Shenyang-Liaoyang area changed greatly, forming a high-gradient zone, reflecting the increase in seismic activity in this area; while the depth of the underground medium field source inverted by Euler deconvolution is 10~40 km, It is consistent with the actual depth of the earthquake and is concentrated near the fault zone. The research results can further provide a certain reference for studying the characteristics of the deep seismogenic environment in Liaoning.

Key words: Time-varying gravity field, Bayesian gravity network adjustment, Campaign gravity survey, Euler deconvolution, Density variation

中图分类号:

P315.7

贾晓东, 翟丽娜, 陈石. 辽宁地区时变重力场源变化特征分析[J]. 地震, 2021, 41(1): 180-190.

JIA Xiao-dong, ZHAI Li-na, CHEN Shi. Analysis on the Characteristics of Time-varying Gravity Field Source Changes in Liaoning Area[J]. EARTHQUAKE, 2021, 41(1): 180-190.

参考文献

[1] Van Camp M, de Viron O, Watlet A, et al. Geophysics from terrestrial time-variable gravity measurements[J]. Reviews of Geophysics, 2017, 55: 938-992.
[2] Tapley B D, Bettadpur S, Ries J C, et al. GRACE measurements of mass variability in the earth system[J]. Science, 2004, 305(5683): 503-505.
[3] Seo K W, Wilson C R, Famiglietti J S, et al. Terrestrial water mass load changes from Gravity Recovery and Climate Experiment (GRACE)[J]. Water Resources Research, 2006, 42(5): 173-180.
[4] Syed T H, Famiglietti J S, Rodell M, et al. Analysis of terrestrial water storage changes from GRACE and GLDAS[J]. Water Resources Research, 2008, 44(2): 339-356.
[5] Steffen H, Wu P, Wang, H. Optimal locations for absolute gravity measurements and sensitivity of GRACE observations for constraining glacial isostatic adjustment on the northern hemisphere[J]. Geophysical Journal International, 2012, 190: 1483-1494.
[6] Ivins E R, James T S, Wahr J, et al. Antarctic contribution to sea level rise observed by GRACE with improved GIA correction[J]. Journal of Geophysical Research: Solid Earth, 2013, 118(6): 3126-3141.
[7] Heck B, Seitz K. A comparison of the tesseroid, prism and point-mass approaches for mass reductions in gravity field modelling[J]. Journal of Geodesy, 2017, 81(2): 121-136.
[8] Barnes, D F. Gravity changes during the Alaska earthquake[J]. Journal of Geophysical Research, 1966, 71: 451-456.
[9] Chen Y T, Gu H D, Lu Z X. Variations of gravity before and after the Haicheng earthquake, 1975, and the Tangshan earthquake, 1976[J]. Physics of the Earth and Planetary Interiors, 1979, 18(4): 330-338.
[10] Li R H, Fu Z Z. Local gravity variations before and after the Tangshan earthquake (M=7.8) and dilatation process[J]. Tectonophysics, 1983, 97(1-4): 159-169.
[11] Zhu Y Q, Zhan F B, Zhou J C, et al. Gravity measurements and their variation before the 2008 Wenchuan earthquake[J]. Bulletin of The Seismological Society of America, 2010, 100(5B): 2815-2824.
[12] 祝意青, 梁伟锋, 湛飞并, 等. 中国大陆重力场动态变化研究[J]. 地球物理学报, 2012, 55(3): 804-813.
ZHU Yi-qing, LIANG Wei-feng, ZHAN Fei-bing, et al. Study on dynamic change of gravity field in China continent[J]. Chinese Journal of Geophysics, 2012, 55(3): 804-813 (in Chinese).
[13] Chen S, Liu M, Xing L L, et al. Gravity increase before the 2015 M_W7.8 Nepal earthquake[J]. Geophysical Research Letters, 2016, 43(1): 111-117.
[14] Hao H T, Xing L L, Liu Z W, et al. Gravity variation in the Tibet area before the Nepal M_S8.1 earthquake[J]. Geodesy and Geodynamics, 2016, 7(6): 425-431.
[15] Xuan S B, Jin S G, Chen Y, et al. Insight into the preparation of the 2016 M_S6.4 Menyuan earthquake from terrestrial gravimetry-derived crustal density changes[J]. Scientific Reports, 2019, 9: 18227.
[16] 祝意青, 徐云马, 吕弋培, 等. 龙门山断裂带重力变化与汶川8.0级地震关系研究[J]. 地球物理学报, 2009, 52: 2538-2546.
ZHU Yi-qing, XU Yun-ma, LÜ Yi-pei, et al. Relations between gravity variation of Longmenshan fault zone and Wenchuan M_S8.0 earthquake[J]. Chinese Journal of Geophysics, 2009, 52: 2538-2546 (in Chinese).
[17] 申重阳, 李辉, 孙少安, 等. 重力场动态变化与汶川M_S8.0地震孕育过程[J]. 地球物理学报, 2009, 52(10): 2547-2557.
SHEN Chong-yang, LI Hui, SUN Shao-an, et al. Dynamic variations of gravity and the preparation process of the Wenchuan M_S8.0 earthquake[J]. Chinese Journal of Geophysics, 2009, 52(10): 2547-2557 (in Chinese).
[18] 祝意青, 闻学泽, 孙和平, 等. 2013年四川芦山M_S7.0地震前的重力变化[J]. 地球物理学报, 2013, 56(6): 1887-1894.
ZHU Yi-qing, WEN Xue-ze, SUN He-ping, et al. Gravity changes before the Lushan, Sichuan, M_S=7.0 Earthquake of 2013[J]. Chinese Journal of Geophysics, 2013, 56(6): 1887-1894 (in Chinese).
[19] 郑兵, 易天阳, 杨洋, 等. 2013年芦山7.0级地震前后重力场变化特征[J]. 中国地震, 2014, 30(4): 543-550.
ZHENG Bing, YI Tian-yang, YANG Yang, et al. The variation characteristics of gravity field before and after of the 2013 Lushan M_S7.0 earthquake[J]. Earthquake Research in China, 2014, 30(4): 543-550 (in Chinese).
[20] 祝意青, 梁伟锋, 赵云峰, 等. 2017年四川九寨沟M_S7.0地震前区域重力场变化[J]. 地球物理学报, 2017, 60(10): 4124-4131.
ZHU Yi-qing, LIANG Wei-feng, ZHAO Yun-feng, et al. Gravity changes before the Jiuzaigou, Sichuan, M_S7.0 earthquake of 2017[J]. Chinese Journal of Geophysics, 2017, 60(10): 4124-4131 (in Chinese).
[21] Zhang Y, Chen S, Xing L L, et al. Gravity changes before and after the 2008 M_W7.9 Wenchuan earthquake at Pixian absolute gravity station in more than a decade[J]. Pure and Applied Geophysics, 2020, 177: 121-133.
[22] 祝意青, 郭树松, 刘芳. 攀枝花6.1、姚安6.0级地震前后区域重力场变化[J]. 大地测量与地球动力学, 2010, 30(4): 8-11+18.
ZHU Yi-qing, GUO Shu-song, LIU Fang. Variation of gravity field before and after Panzhihua M_S6.1 and Yaoan M_S6.0 earthquakes[J]. Journal of Geodesy and Geodynamics[J]. 2010, 30(4): 8-11+18 (in Chinese).
[23] 陈石, 王青华, 王谦身, 等. 云南鲁甸M_S6.5地震震源区和周边三维密度结构及重力场变化[J]. 地球物理学报, 2014, 57(9): 3080-3090.
CHEN Shi, WANG Qing-hua, WANG Qian-shen, et al. The 3D density structure and gravity change of Ludian M_S6.5 Yunnan epicenter and surrounding regions[J]. Chinese Journal of Geophysics, 2014, 57(9): 3080-3090 (in Chinese).
[24] 石磊, 贾晓东, 陈石, 等. 2014年云南鲁甸6.5级地震前重力变化特征与3维反演[J]. 地震地质, 2014, 36(4): 1217-1227.
SHI Lei, JIA Xiao-dong, CHEN Shi, et al. Gravity changes before the Ludian, Yunnan, M_S6.5 earthquake of 2014 and the three-dimensional inversion research[J]. Seismology and Geology, 2014, 36(4): 1217-1227 (in Chinese).
[25] 苏琴, 祝意青, 徐锐, 等. 芦山地震、鲁甸地震、康定地震前后三岔口地区地壳形变异常特征分析[J]. 大地测量与地球动力学, 2017, 37(6): 568-574.
SU Qin, ZHU Yi-qing, XU Rui, et al. Analyzing crust deformation anomaly in divergence area before and after Lushan, Ludian and Kangding Earthquakes[J]. Journal of Geodesy and Geodynamics, 2017, 37(6): 568-574 (in Chinese).
[26] Kennedy J R, Ferré Ty P A. Accounting for time- and space-varying changes in the gravity field to improve the network adjustment of relative-gravity data[J]. Geophysical Journal International, 2016, 204(2): 892-906.
[27] Chen S, Zhuang J C, Li X Y, et al. Bayesian approach for network adjustment for gravity survey campaign: Methodology and model test[J]. Journal of Geodesy, 2019, 93(5): 681-700.
[28] 陈兆辉, 孟小红, 张双喜, 等. 青藏高原东南缘多尺度重力场变化特征及孕震机理分析[J]. 地震地质, 2019, 41(3): 690-703.
CHEN Zhao-hui, MENG Xiao-hong, ZHANG Shuang-xi, et al. Characteristic of multi-scale gravity field variation and seismogenic mechanism analysis in the southeastern Tibetan plateau[J]. Seismology and Geology, 2019, 41(3): 690-703 (in Chinese).
[29] 范美宁. 欧拉反褶积方法的研究及应用[D]. 长春: 吉林大学, 2006 .
FAN Mei-ning. The study and application of Euler deconvolution method[D]. Changchun: Jilin University, 2006 (in Chinese).
[30] 高倩, 陈石. 基于欧拉反褶积方法计算川滇交界重力变化场源特征[J]. 地球物理学进展, 2015, 30(2): 503-509.
GAO Qian, CHEN Shi. Based on the euler deconvolution technique to determine the field source characteristics of gravity Variation in the boundary of Sichuan and Yunnan[J]. Progress in Geophysics, 2015, 30(2): 503-509 (in Chinese).
[31] 翟丽娜, 贾晓东, 焦明若, 等. 基于欧拉反褶积方法计算辽宁地区重力变化场源特征[J]. 地震研究, 2020, 43(2): 388-393.
ZHAI Li-na, JIA Xiao-dong, Jiao Ming-ruo, et al. Determine the field source characteristics of gravity variation in Liaoning based on the Eulerdeconvolution technique[J]. Journal of Seismological Research, 2020, 43(2): 388-393 (in Chinese).
[32] 刘芳, 祝意青, 梁伟锋, 等. 基于欧拉反褶积方法估算华北地区重力变化的等效源参数[J]. 地震, 2016, 36(4): 163-170.
LIU Fang, ZHU Yi-qing, LIANG Wei-feng, et al. Estimation of equivalent source parameters of gravity changes in North China based on euler deconvolution method[J]. Earthquake, 2016, 36(4): 163-170 (in Chinese).
[33] 翟丽娜, 贾晓东, 李彤霞, 等. 辽宁地区重力场动态变化特征分析[J]. 防灾减灾学报, 2016, 32(2): 10-14.
ZHAI Li-na, JIA Xiao-dong, LI Tong-xia, et al. Analysis on the characteristics of dynamic changes of gravity field in Liaoning area[J]. Journal of Disaster Prevention and Reduction, 2016, 32(2): 10-14 (in Chinese).

辽宁地区时变重力场源变化特征分析

Analysis on the Characteristics of Time-varying Gravity Field Source Changes in Liaoning Area

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