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EN
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.
5
Content available remote GPS Network "Sudeten"- preliminary results of the Campaign s 1998-1999
EN
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.
6
Content available remote Geodynamical pattern of the Bohemian Massif
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