Relationship between gravity variation and seismic hazards in the western China
Chen Shi
Xu Weimin
Jiang Changsheng
Abstract：In this paper,based on the regional gravity field variation derived from the mobile gravity observed data in the western China,we have got the six sorts of gravity variations at each space-fixed cell by means of the potential field transform.On the basis of the six types of variations,taking the three-issue gravity data in the years 2002,2005,2008 as study objects,we computed and analyzed the relationships between the MS ≥6.0 earthquake and the gravity vari-ation with the derived parameters,so that we could try to establish the index system for the purpose of the earthquake forecast.Our study results show that there is no significant relationship between the gravity variation and epicentral location before earthquakes.However,the amplitude of analytic signal and vertical gradient of gravity variation are related to the location of earthquakes happened in future,which can be used for the prediction of the earthquake loca-tion as earthquake precursory anomalies.
Keywords：mobile gravitygravity variationearthquake forecastindex sys-tempotential field transform
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：13( 575-587 )