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Journal of Geodesy

, Volume 93, Issue 12, pp 2529–2541 | Cite as

Surface deformation processes in the Carmel Fault based on 17 years of GPS measurements

  • Gilad Even-TzurEmail author
  • Joerg Reinking
Original Article
  • 146 Downloads

Abstract

Tectonic activity and crustal deformation in northern Israel are mainly related to the Dead Sea Fault (DSF) and the Carmel–Gilboa Fault System (CGFS). The CGFS is composed of several NW–SE trending faults while the main faults are the Carmel Fault (CF) and Gilboa Fault (GF). The CGFS divides the Sinai Sub-Plate into two tectonic domains. In this study, we geodetically investigate surface deformation processes in the Carmel Fault region. Beside the processing and analysis of GPS measurements, we highlight geodetic aspects in the process of deformation analysis in geodetic monitoring networks. We implement the Extended Free Network Adjustment Constraints solution to calculate the velocities of 24 sites that were measured eight times between 1999 and 2016 using Global Positioning System (GPS). The regional site velocities were estimated with respect to a local datum that was defined by a stable cluster of sites on one side of the fault. We introduced the site velocities into the estimation of surface deformation parameters by using affine transformation also with respect to a local datum. The coordinates of network sites can be transformed to any desired datum by using extended similarity transformation. Examination of the velocity field in relation to a datum defined by points in the Galilee region raises the suggestion that the velocities in the Yizre’el Valley region are due to activities along the GF or similar trending faults on the northern side of the valley which are halted by the Tivon Hills. The best set of deformation parameters, the one which better describes the velocity field, was determined by the second-order Akaike Information Criterion (AICc). The results show significant sinistral deformations of less than 1 mm/year along the Carmel Fault accompanied with extensions and shear strain.

Keywords

Carmel–Gilboa Fault System GPS Velocity field Extended Free Network Datum 

Notes

Acknowledgements

Most of the measurements that were used in this study were obtained during summer camps carried out by undergraduate and graduate students from the Division of Mapping and Geo-Information Engineering, Technion, Israel; and the Department of Construction and Geoinformation, Jade University of Applied Sciences, Germany, under the supervision of Hillrich Smit-Philipp. We greatly appreciate their significant contribution.

Author contributions

GET and JR designed and performed the research. JR analyzed the GPS data, and GET takes responsibility for the integrity of the data and data analysis. GET wrote the paper, and JR revised it critically and approved the final version.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Division of Mapping and Geo-Information EngineeringTechnion - Israel Institute of TechnologyHaifaIsrael
  2. 2.Department of Construction and GeoinformationJade University of Applied SciencesOldenburgGermany

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