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A Preliminary Research on the Application of GPS to Regional Crustal Movement and Judgement of Seismic Risk Region

         

摘要

We analyzed the present state of crustal horizontal movement in part of the North China region using existing GPS re-observation data (1992-1995) and drew the following conclusions: (1) The monitored region appears to be in tensile movement, with the trend of the principal tensile strain in the WNW-ESE direction; (2) There are two zones of higher maximum shear strain in the monitored region, namely, the Beijing zone and two sides of the Tancheng-Lujiang fault near Linyi; (3) There exists a striped compressive zone which stretches in the NNE-SSW direction; the zone of maximum planar compression is located in the Beijing zone; (4) The displacement field has an obvious zoned distribution.

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