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The principle of measuring unusual change of underground mass by optical astrometric instrument
Wang JC(王建成); Chen LF(陈林飞); Yang L(杨磊); Cheng XM(程向明); Su J(苏婕); Li, BH; Mao W(冒蔚); Tie QX(铁琼仙)
Source PublicationGeodesy and Geodynamics
2012
Volume3Issue:4Pages:32-38
DOI10.3724/SP.J.1246.2012.000032
ClassificationP111
Contribution Rank第1完成单位
Indexed By其他
KeywordAstrometry Earthquake Forecast Gravity Instrument Plumb Line
Abstract

Optical observations from a ground-based astrometric instrument provide a unique set of data sensitive to variations of local plumb line, which represent the change of local gravitational field on the ground. The
local gravitational change could be caused by density variation or movement of underground mass in addition to tidal action. Earthquake was found to be related with gravitational change. A seismic zone could have abnormal underground material density, causing the variation of plume line on the ground. In this frame, the astrometric telescope can measure the variation of local plumb line by observing the local astronomical longitudes and latitudes from stars in the Hipparcos catalog.
In this study, we estimate the deflection angle of the plumb line on a ground site, and give a relation between the angle, abnormal mass and site distance (depth and horizontal distance). Then we derive the abnormality of underground material density using the plumb lines measured at different sites, and study the earthquake gestation, development and occurrence. Using the deflection angles of plumb lines observed at two sites, we give a method to calculate the mass and the center of gravity of underground materials. We also estimate the abnormal masses of latent seismic zones with different energy, using thermodynamic relations, and introduce a new optical astrometric instrument we had developed.

Funding ProjectNational Natural Science Foundation of China[11163006] ; National Natural Science Foundation of China[11173054] ; National Basic Research Program of China(973 Program)[2009CB824800] ; Policy Research Program of Chinese Academy of Sciences[KJCX2-YW-T24]
Funding OrganizationNational Natural Science Foundation of China[11163006,11173054] ; National Basic Research Program of China(973 Program)[2009CB824800] ; Policy Research Program of Chinese Academy of Sciences[KJCX2-YW-T24]
Language英语
Subject Area天文学 ; 天体测量学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
ISSN1674-9847
URL查看原文
Archive Date2013-03-20
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6638
Collection天体测量及应用研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorWang JC(王建成)
Affiliation1.Yunnan Observatory/National Astronomical Observatories, Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
2.Kunming University of Science and Technology, Kunming 650051, China
Recommended Citation
GB/T 7714
Wang JC,Chen LF,Yang L,et al. The principle of measuring unusual change of underground mass by optical astrometric instrument[J]. Geodesy and Geodynamics,2012,3(4):32-38.
APA Wang JC.,Chen LF.,Yang L.,Cheng XM.,Su J.,...&Tie QX.(2012).The principle of measuring unusual change of underground mass by optical astrometric instrument.Geodesy and Geodynamics,3(4),32-38.
MLA Wang JC,et al."The principle of measuring unusual change of underground mass by optical astrometric instrument".Geodesy and Geodynamics 3.4(2012):32-38.
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