Repeated Geodetic Measurements in the West Bohemia Seismoactive Region: Period 1993 - 1996 |
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| Authors: | Špičák A Mrlina J Jindra D Mervart L |
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| Institution: | (1) Geophysical Instiute, Acad. Sci. Czech Rep., Prague, Czech Republic;(2) GEOINVEST Ltd., Prague, Czech Republic |
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| Abstract: | The western part of the Bohemian Massif is characterized by repeated occurrences of intraplate earthquake swarms. To study surface deformations of this anomalous region, a network covering about 2000 square kilometres for repeated geodetic measurements was established in 1993 - 1994. The positions of the individual points of the network were carefully picked with respect to local tectonic structure and earthquake foci distribution. GPS and precise levelling measurements were performed 1-2 times a year. The GPS data were processed by Bernese GPS software.
No tendency to any displacement - either horizontal or vertical - of geological blocks was derived from the geodetic data for the period 1993 - 96. Only displacements of less than 5 mm/year in average could occur in the whole region in that period; larger displacements would have been revealed by our measurements. |
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| Keywords: | earthquake swarms surface deformations GPS precise levelling |
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