The Western Bohemia/Vogtland Region in the Light of the Webnet Network

Authors: Horálek J.¹; Fischer T.²; Bou scaron ková A.³; Jedli ccaron ka P.³

Source: Studia Geophysica et Geodaetica, Volume 44, Number 2, April 2000 , pp. 107-125(19)

Publisher: Springer

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Abstract:

The local network of digital seismic stations WEBNET monitors the seismic activitv of practically the whole region of Western Bohemia/Vogtland swarms. The network consists of ten short-period stations and one very broadband station. The paper describes the configuration of the network, instrumental equipment and the basic parameters of the stations. The method of and formula for computing the local magnitudes from the WEBNET and KRASLICE seismograms are also given. Based on continuous WEBNET observations in the period 1995-1999, we were able to improve the model of temporal and spatial energy release in the region, the principal characteristics of which are summarised in the paper. Apart from direct P and S waves, the WEBNET seismograms also contain other significant P- and S-type waves, provisionally interpreted as reflected PxP, SxS and SxP waves. The fundamental characteristics of these waves are given in the paper, and tentative mechanisms of their origination are discussed. The large residua in the travel times of the P and S waves, and the discrepancies in the seismograms recorded at stations located east of the principal focal zone are pointed out.

Keywords: West Bohemia; earthquake swarms; local seismic network; local magnitude; local earthquake waveform

Language: English

Document Type: Research article

Affiliations: 1: Geophysical Institute, Acad. Sci. Czech Republic, Prague. jhr@ig.cas.cz 2: Geophysical Institute, Acad. Sci. Czech Republic, Prague. tomas@ig.cas.cz 3: Geophysical Institute, Acad. Sci. Czech Republic, Prague

Publication date: 2000-04-01