Plate rigidity inversion in southern California using interseismic GPS velocity field

Details Plate rigidity inversion in southern California using interseismic GPS velocity field Plate rigidity inversion in southern California using interseismic GPS velocity field

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011geoji.187..783c&link_type=abstract

Geophysical Journal International, Volume 187, Issue 2, pp. 783-796.

Statistics

Computation

1

Inverse Theory, Seismic Cycle, Dynamics Of Lithosphere And Mantle, Rheology: Crust And Lithosphere

Scientific paper

This paper presents an inversion method using the interseismic velocity field to determine effective rigidity of the lithosphere. The method is based on the minimization of a cost function defined as the quadratic measure of the difference between measured and modelled velocity fields on a discrete set of points. The continuous mapping of the rigidity is fulfilled with a limited set of parameters and the forward solution is achieved using a plane stress finite element code. The computation of the cost function gradient in the parameters' space allows one to iteratively find the best parameters set through a suitable optimization algorithm.
We first design a benchmark including an abrupt rigidity variation that cannot be described by a continuous function. For such a case, we show that increasing the number of parameters is a way to accurately describe sharp variations of the rigidity map. Then, we use a dense GPS velocity field over the southwestern United States to estimate the corresponding rigidity variations for different spatial resolutions of the parameters' grid. We analyse the conceptual and practical difficulties associated with our methodology. Finally, rigidity maps obtained by our inversion method in southwestern United States and particularly across the San Andreas Fault System are reviewed and compared to current plate rigidity estimates and geophysical data over this area.

Affiliated with

Also associated with

No associations

Rating

Plate rigidity inversion in southern California using interseismic GPS velocity field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Plate rigidity inversion in southern California using interseismic GPS velocity field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plate rigidity inversion in southern California using interseismic GPS velocity field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-738796