The Western Bohemia/Vogtland region in the light of the WEBNET network

The local network of digital seismic stations WEBNET monitors the seismic a ctivity of practically the whole region of Western Bohemia/Vogtland swarms. The network consists of ten short-period stations and one very broadband s tation. The paper describes the configuration of the network, instrumental equipment and the basic parameters of the stations. The method of and formu la far computing the local magnitudes from the WEBNET and KRASLICE seismogr ams are also given. Based on continuous WEBNET observations in the period 1 995-1999, we were able to improve the model of temporal and spatial energy release in the region, the principal characteristics of which are summarise d in the paper. Apart from direct P and S waves, the WEBNET seismograms als o contain other significant P- and S-type waves, provisionally interpreted as reflected PxP, SxS and SxP waves. The fundamental characteristics of the se waves are given in the paper, and tentative mechanisms of their originat ion are discussed. The lar ge residua in the travel times of the P and S wa ves, and the discrepancies irt the seismograms recorded at stations located east of the principal focal zone ara pointed out.