NDLI: The Gravity Field of the Vogtland and NW Bohemia: Presentation of a Project

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Comment on the “Analysis of the State of Stress During the 1997 Earthquake Swarm in Western Bohemia” by A. Slancová and J. Horálek (Studia geoph. et geod. 44(2000), 272–291)

Reply to Comment by V. Vavryčuk on “Analysis of the State of Stress During the 1997 Swarm in the Western Bohemia” by A. Slancová and J. Horálek

Studia Geophysica et Geodaetica : Volume 44, Issue 3, July 2000

Studia Geophysica et Geodaetica : Volume 44, Issue 2, April 2000

Studia Geophysica et Geodaetica : Volume 44, Issue 1, January 2000

Studia Geophysica et Geodaetica : Volume 43

Studia Geophysica et Geodaetica : Volume 42

Studia Geophysica et Geodaetica : Volume 41

The Gravity Field of the Vogtland and NW Bohemia: Presentation of a Project

Content Provider	Springer Nature Link
Author	Hofmann, Y. Jahr, T. Jentzsch, G. Bankwitz, P. Bram, K.
Copyright Year	2000
Abstract	The Vogtland and NW Bohemia are characterized geoscientifically by periodically occurrence of swarm earthquakes. The basic geophysical mechanism is not yet sufficiently clarified, just like detail questions to geology in especially the deeper underground. Complex geophysical investigations in the seismoactive region indicate geodynamic phenomena like mass redistribution or stress accumulation and release (Spičák et al., 1998). According to Grünthal (1989) a weakness zone is suggested in the region of the swarm earthquakes. This zone can be caused by fluid-tectonics (Kämpf et al., 1992), a mantle plume (pers. com. J. Svancara, 1999) and/or by the geometry of the geological structures (Neunhöfer & Güth, 1988). A three-dimensional gravimetric model can clear up the underground situation. By means of high-resolution gravimetry a three-dimensional model will be developped for the Vogtland and NW Bohemia region. In the first step a homogeneous Bouguer map of the Vogtland and NW Bohemia was created (fig. 1) containing gravity structures analysed by Ibrmajer & Suk (1989) and Blízkovsky et al. (1985). The used gravimetric data were made available by the Saxonian National Office for Environment and Geology, by the Czech Geological Survey, Prague and by the GGA Hannover. In the context with the interpretation of the deep-seismic profile MVE 90 a two-dimensional gravimetric modeling was carried out (Behr et al., 1994), too. Anomaly-producing source bodies apparently do not offer themselves in a two-dimensional model, because after Jung (1961) the length of a gravimetric source structure must be about four times larger than it's width. The technique of the three-dimensional gravimetric modeling by means of any polyhedrons was developed by Götze (1976, 1984). Gravimetry is a potential method and supplies an infinite number of solutions, so the model has to be developed close to other geoscientific results. The aim is to construct a high-resolution three-dimensional underground model, which includes the upper earth's crust and the deep-seated structures of the middle and lower crust, too. The determination of the mass distribution in the underground supplies contradicting or supporting facts for geodynamic views in the Vogtland and NW Bohemia for example of Bankwitz et al. (1993). The interpretation of the Bouguer map of the Vogtland and a three-dimensional gravimetric model ought to contribute a substantial, also geodynamic part to understand the origin and the emergence of the swarm earthquakes in this region.
Starting Page	608
Ending Page	610
Page Count	3
File Format	PDF
ISSN	00393169
Journal	Studia Geophysica et Geodaetica
Volume Number	44
Issue Number	4
e-ISSN	15731626
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2000-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Structural Geology Geophysics/Geodesy Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology Geophysics

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Focal Mechanisms and Stress Field in The Region Vogtland/Western Bohemia

Seismic and Aseismic Movements in the Western Bohemia/Vogtland Area

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

Seismicity in the Vogtland/Western Bohemia Earthquake Region Between 1962 and 1998

The Catalogue of the Vogtland/Western Bohemia Earthquakes and Vocatus as an Auxiliary Code

Migration of Events During The January 1997 Earthquake Swarm (The West Bohemia/Vogtland Region)

Statistical Investigations of Earthquake Swarms within the Vogtland/NW-Bohemian Area

Faulting style and stress field investigations for swarm earthquakes in NE Baveria/Germany – the transition between Vogtland/NW-Bohemia and the KTB-site

Role of crustal fluids in triggering the West Bohemia/Vogtland earthquake swarms: Just what we know (a review)

The Gravity Field of the Vogtland and NW Bohemia: Presentation of a Project

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The Gravity Field of the Vogtland and NW Bohemia: Presentation of a Project