Long borderline between Poland, Czech Republic and Slovakia coincides generally with very interesting geotectonic formations of different age that give an excellent opportunity to undertake a comparative studies that have a significant scientific and practical value. The main general objective of the Project is to investigate the variations of the recent crustal movements and periodic monitoring of the horizontal and vertical displacements in the structural active tectonic zones of the Polish and Czech parts of the Sudetes Mts. and the Western Carpathians as well as in the regions located close to the existing and planned investments and technical constructions (water reservoirs and dams, power stations, communication lines, etc.). In the Tatra Mts., that represent the youngest tectonic formation of the area of Central Europe, the tectonic movements and relativety significant velocity vectors will be monitoring as well as the location of the geoid (the quasi-geoid) related to the geocentric reference ellipsoid will be determined. The established test control networks in Sudetes Region and in Tatra Mts. will be used by Polish, Czech and Slovak geodesists and surveyors for testing new technologies and upgrading the practical quick methods of satellite and geodetic positioning procedures applicable for geodesy and navigation, in particular in hilly and mountainous areas. The project will be realised in the frame of the CEI CERGOP Study Group CSG.5 "Geotectonic analysis of the regions of Central Europe". 1. BACKGROUNDS AND OBJECTIYES OF THE PROJECT Long borderline between Poland, Czech Republic and Slovakia coincides generally with very interesting geotectonic formations of different agę that give an escellent opportunity to undertake a comparative studies that have a significant scientiflc and practical value. Mobility interrelations between two fundamenta! geological structures in Central Europę, which represent old platform and young orogenic formations, influence to whole European geodynamics. Geodynamical mobility monitored up-to-now
This paper describes cross-border earthquake hazard maps calculated in terms of macroseismic intensities and peak ground accelerations (PGA) for the Czech Republic, Poland and Slovakia (CZ-PL-SK). The study has been done in the framework of the Global Seismic Hazard Assessment Program (GSHAP). The new earthquake parametric catalogue for CZ-PL-SK was used. The catalogue represents an updated, revised and comprehensive seismicity database without boundary problems. Earthquake data have been normalized to obtain a reliable annual recurrence graph for each seismic region and the maximum expected earthquakes have been estimated. Calculated attenuation laws allowed more advanced earthquake hazard maps to be defined. Using Cornell's standard probabilistic method, the hazard maps were calculated for the return periods 475, 1000, and 5000 years. For the period of 475 years, good coincidences were found when comparing this newely calculated intensity map with that of Grunthal for Germany (D) and Austria (A); and the PGA map with the effective ground acceleration map for Austria by Lenhardt.
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The geodynamical GPS network SUDETEN covers the area Middle- and East-Sudeten Mts. and Sudeten Foreland and links togetber existing Czech and Polish local GPS networks in this area. The Polish part of this network includes selected sites of the network GEOSUD, established by Department of Geodesy and Photogrammetry of Agricultural University of Wrocław in 1996. The Czech part consists mainly of the network SILESIA built in 1997 by the Institute of Rock Structure and Mechanics of the Academy of Sciences in Prague. The first joint GPS observation campaign on both networks was performed in August 1997, the second one in September 1998 and the third one in September 1999. Results of the first two campaigns were presented on the 1st Czech-Polish Workshop on "Recent Geodynamics of the East Sudeten and Adjacent Areas" in Ramzova (Schenk et al., 1999). A methodology of the GPS satellite signals monitoring applied in the last two campaigns allows errors in the horizontal direction 2 mm and in the vertical direction 5-6 mm not to be exceeded. The GPS observation data of all campaigns were processed using Bernese GPS Software v. 4.2. The network was linked to three EUREF permanent stations (GOPE, PENC and BOR1) and their data were included to the processing. The preliminary results concerning the first geodynamical evidences in the Sudeten Mts. obtained from the GPS data.
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