Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Relation of surface movements in West Bohemia to earthquake swarms

Abstract

GPS observations in the Western Bohemia/Vogtland earthquake swarm region revealed indications of horizontal displacements of low amplitude, and no clear long-term trend in 1993–2007. On the other hand, in 1998–2001 there was relatively significant active movement along NNE-SSW oriented line that we called the “Cheb-Kraslice GPS Boundary” (ChKB), identical with an important limitation of earthquake activity. The most impressive were dextral (right-lateral) movements in the 1998–1999 period followed by reverse sinistral (left-lateral) movements in 1999–2000 that correlate with prevailing motion defined by fault plane solutions of the Autumn 2000 earthquake swarm. Before the February 2004 micro-swarm, two points located on opposite sides of the Mariánské Lázně fault showed extension in the order of about 7 mm in the same NNE-SSW direction of ChKB. The new NOKO permanent GPS station in Nový Kostel showed the peak-to-peak vertical changes up to 10 mm before and during the February 2007 micro-swarm.

Annual precise levelling campaigns in the local network around Nový Kostel revealed regular vertical displacements during the 1994, 1997 and 2000 earthquake swarms. The points around the Nový Kostel seismological station showed uplift during the active periods, including the micro-swarm February 2004. However, no such indication was observed on levelling points in the period of the February 2007 swarm. Long-term vertical displacements depend on the same direction NNE-SSW (ChKB) as the GPS displacements. Both geodetic techniques have revealed oscillating displacements, GPS horizontal, and levelling vertical, rather than any long-term trends in the study period 1993–2007. The displacements exhibited significant spatial and temporal relation to tectonic activity (earthquake swarms) including their coincidence with the seismologically determined sense of motion along the fault plane during earthquakes.

This is a preview of subscription content, log in to check access.

References

  1. Bankwitz P., Schneider G., Kämpf H. and Bankwitz E., 2003. Structural characteristics of epicentral areas in Central Europe: study case Cheb Basin (Czech Republic). J. Geodyn., 35, 5–32.

  2. Bräuer K., Kämpf H., Strauch G. and Weise S., 2003. Isotopic evidence (3He/4He, 13C (CO2)) of fluid-triggered intraplate seismicity. J. Geophys. Res., 108(B2), Art.No. 2070, doi: 10.1029/2002JB002077.

  3. Caporali A., Braitenberg C. and Massironi M., 2005. Geodetic and hydrological aspect of the Merano earthquake of 17 July 2001. J. Geodyn., 39, 317–336, doi: 10.1016/j.jog.2005.01.001.

  4. Even-Tzur G., Salmon E., Kozakov M. and Rosenblum M., 2004. Designing a geodetic-geodynamic network: a comparative study of data processing tools. GPS Solutions, 8, 30–35.

  5. Fischer T., 2003. The August–December 2000 earthquake swarm in NW Bohemia: the first results based on automatic processing of seismograms. J. Geodyn., 35, 59–81.

  6. Fischer T. and Horálek J., 2003. Space-time distribution of earthquakes in the principal focal zone of the NW Bohemia/Vogtland seismoactive region: period 1985–2001. J. Geodyn., 35, 125–144.

  7. Fischer T. and Michálek J., 2008. Post 2000-swarm microearthquake activity in the principal focal zone of West Bohemia/Vogtland: space-time distribution and waveform similarity analysis. Stud. Geophys. Geod., 52, 493–511.

  8. Havíř J., 2005. Orientations of the principal paleostresses in the Western Bohemia seismoactive region and their comparison with recent stresses. J. Czech Geol. Soc., 50, 133–142.

  9. Mrlina J., 2000. Vertical displacements in the Nový Kostel seismoactive area. Stud. Geophys. Geod., 44, 336–345.

  10. Mrlina J., Kämpf H., Geissler W.H. and van den Boogart P., 2007. Assumed Quaternary maar structure at the Czech/German boundary between Mýtina and Neualbenreuth (western Eger Rift, Central Europe): geophysical, petrochemical and geochronological indications Z. Geol. Wiss., 35, 213–230.

  11. Mrlina J., Špičák A. and Skalský L., 2003. Non-seismological indications of recent tectonic activity in the West Bohemia earthquake swarm region. J. Geodyn., 35, 221–234.

  12. Plomerová J., Achauer U., Babuška V., Vecsey L., Bohema Working Group, 2007. Upper mantle beneath the Eger Rift (Central Europe): plume or asthenosphere upwelling? Geophys. J. Int., 169, 675–682, doi: 10.1111/j.1365-246X.2007.03361.x.

  13. Seidl M., 2006. Application of GPS Technology in Local Networks — Geodynamic Network Cheb. Ph.D. Thesis, Czech Technical University, Praha.

  14. Schenk V., Kottnauer P., Schenková Z. and Hájek P., 2004. Czech permanent GPS observatories for geodynamic investigations of the Bohemian Massif operated by the Institute of Rock Structure and Mechanics, Prague. Acta Geodynamica et Geomaterialia, 1, No. 3 (135), 111–114.

  15. Špičák A., Mrlina J., Jindra D. and Mervart L., 1997. Repeated geodetic measurements in the West Bohemia seismoactive region: period 1993–1996. Stud. Geophys. Geod., 41, 319–328.

  16. Vyskočil P. and Zeman A., 1979. Recent movements of the Earth’s crust in the region of the Bohemian Massif and its south-east border. In: Vaněk J. (Ed.), Geodynamic Investigations in Czechoslovakia. Veda, Bratislava, Slovakia, 139–146.

  17. Wendt J. and Dietrich R., 2003. Determination of recent crustal deformation based on precise GPS measurements in the Vogtland earthquake area. J. Geodyn., 35, 235–246.

Download references

Author information

Correspondence to J. Mrlina.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Mrlina, J., Seidl, M. Relation of surface movements in West Bohemia to earthquake swarms. Stud Geophys Geod 52, 549 (2008). https://doi.org/10.1007/s11200-008-0037-8

Download citation

Keywords

  • geodynamics
  • GPS displacements
  • precise levelling
  • surface kinematics
  • West Bohemia