GRAVITY CHANGES BEFORE BADONG EARTHQUAKE
1)Key Laboratory of Earthquake Geodesy,Institute of Seismology,CEA,Wuhan 430071
2)Wuhan Base for Institute of Crastal Dynamics,CEA,Wuhan 430071
Abstract Quasistable adjustment has been carried out to the Three Gorges mobile gravity data since 2010.Six gravity change maps and four gravity change time series curves were obtained.The results show that 1)It is neccessary to test scale value in processing gravity data.2)From 2010,gravity changes curves in Buzhuanghe and Liantuo station are related to water level changes of Changjiang River and its branches.Therefore,the gravity data in the stations should not be used.3)Befores Badong Earthquake,the gravity values rise and fall repeatedly.Badong Earthquake occured in the time when the gravity value was between rising and falling.
Key words :
Three Gorges
Badong earthquake
water loading
gravity changes
quasi-stable adjustment
Received: 12 March 2014
Published: 28 May 2014
Cite this article:
Liu Shaoming,Sun Shaoan,Hao Hongtao et al. GRAVITY CHANGES BEFORE BADONG EARTHQUAKE[J]. jgg, 2014, 34(3): 31-34.
Liu Shaoming,Sun Shaoan,Hao Hongtao et al. GRAVITY CHANGES BEFORE BADONG EARTHQUAKE[J]. jgg, 2014, 34(3): 31-34.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2014/V34/I3/31
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