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首页> 外文期刊>Contributions to Geophysics and Geodesy >Comparison of extensometric results measured in the Vyhne Tidal Station (Slovakia) and in the Sopronbanfalva Geodynamic Observatory (Hungary)
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Comparison of extensometric results measured in the Vyhne Tidal Station (Slovakia) and in the Sopronbanfalva Geodynamic Observatory (Hungary)

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摘要

Two extensometer stations have been set up at the margin of the Pannonian Basin to monitor tectonic movements as well as Earth tides and related phenomena. Because the Sopronbanfalva Geodynamic Observatory (SGO) in Hungary and the Vyhne Tidal Station (VTS) in Slovakia are located in different geological, topographic, and tectonic environments, the analysis and comparison of the extensometer data measured here provides a useful opportunity to interpret the observed data. The tectonic deformation at the SGO shows an average contraction of: -2.94 mu str y(-1) (1 mu str is 10(-6) relative deformation) which can be explained by the uplift of the Alps and the anticlockwise motion of the Adria microplate, causing compression in the Eastern Alps. At the VTS an average compression of -14.8 nstr y(-1) (1 nstr is 10(-9) relative deformation) was measured which can be explained by the NW compression direction in this area. The measured deformations in both observatories show a good agreement with the results of GPS measurements. The deformation at the VTS is characterized by small dilatation anomalies caused by the different topographic, tectonic environment and probably by the high heat flow in the area of the station. At this station the calculated amplitude factors for O1, P1, K1, M2 are 1.01482, 1.21691, 0.83173, 1.09392 and the ocean load corrected values are 1.10817, 1.35717, 0.92809, 1.28812, respectively. At the SGO the calculated amplitude factors for the same tidal components are 0.58776, 0.38967, 0.41548, 1.00564 and the ocean load corrected values are 0.98893, 1.89117, 1.00430, 1.04962, respectively. These results show that the effect of the ocean tide loading is greater at Sopronbanfalva, than at Vyhne. Based on the comparison, we can say that the result of the local strain measurement can be considered realistic.

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