A finite element analysis of tidal deformation of the entire earth with a discontinuous outer layer

Xing, H. L., Zhang, J. and Yin, C. (2007) A finite element analysis of tidal deformation of the entire earth with a discontinuous outer layer. Geophysical Journal International, 170 3: 961-970.


Author Xing, H. L.
Zhang, J.
Yin, C.
Title A finite element analysis of tidal deformation of the entire earth with a discontinuous outer layer
Journal name Geophysical Journal International   Check publisher's open access policy
ISSN 0956-540X
Publication date 2007
Sub-type Article (original research)
DOI 10.1111/j.1365-246X.2007.03442.x
Volume 170
Issue 3
Start page 961
End page 970
Total pages 10
Place of publication Oxford
Publisher Blackwell Publishing
Collection year 2008
Language eng
Subject C1
Abstract Tidal deformation of the Earth is normally calculated using the analytical solution with some simplified assumptions, such as the Earth is a perfect sphere of continuous media. This paper proposes an alternative way, in which the Earth crust is discontinuous along its boundaries, to calculate the tidal deformation using a finite element method. An in-house finite element code is firstly introduced in brief and then extended here to calculate the tidal deformation. The tidal deformation of the Earth due to the Moon was calculated for an geophysical earth model with the discontinuous outer layer and compared with the continuous case. The preliminary results indicate that the discontinuity could have different effects on the tidal deformation in the local zone around the fault, but almost no effects on both the locations far from the fault and the global deformation amplitude of the Earth. The localized deformation amplitude seems to depend much on the relative orientation between the fault strike direction and the loading direction (i.e. the location of the Moon) and the physical property of the fault.
Keyword Geochemistry & Geophysics
crustal deformation
deformation
finite-element methods
gravity
tides
Frictional Instability
Slip Instability
Intraplate Fault
Northeast Japan
Stick-slip
Simulation
Model
Earthquakes
Contact
Volcano
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 18 Feb 2008, 14:48:43 EST