pure and applied geophysics

, Volume 143, Issue 4, pp 655–671 | Cite as

Simultaneous determination of the source mechanism and the seismic wave energy

  • Petr Kolář
Article
  • 35 Downloads

Summary

It is necessary to know the source mechanism for the determination of the seismic energy of seismic waves from the seismogram recorded at one station. For sparse data (selected events of the 1985/86 Western-Bohemia earthquake swarm) the source mechanisms cannot be determined fromP-wave first motions. Therefore, a new method of determining the source mechanism simultaneously with the energy calculated from observations at two stations has been developed. The method is described and tested. Advantages, disadvantages and the stability of the method are discussed.

Key words

Source mechanism determination seismic energy 

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References

  1. Aki, K., andRichards, P. G.,Quantitative Seismology Theory and Methods (W. H. Freeman and Company, San Francisco 1980).Google Scholar
  2. Antonini, M.,Variations in the focal mechanisms during the 1985/86 western Bohemia earthquake sequence — Correlation with spatial distribution of foci and suggested geometry of faulting. InInduced Seismicity and Associated Phenomena (D. Procházková, ed.) (Geophys. Inst. of Czechosl. Acad. Sci., Prague 1988) pp. 250–270.Google Scholar
  3. Berckhemer, H. andLindenfeld, M.,Determination of source energy form broadband seismograms. InTen Years of Gräfenberg Array (B. Buttkus, ed.) (Hannover 1986) pp. 79–83.Google Scholar
  4. Boatwright, J. (1980),A Spectral Theory for Circular Seismic Sources; Simple Estimation of Source Dimension, Dynamic Stress Drop and Radiated Seismic Energy, Bull. Seismol. Soc. Am.70, 1–27.Google Scholar
  5. Boatwright, J., andFletcher, J. B. (1986),The Partition of Radiated Energy Between P and S Waves, Bull. Seismol. Soc. Am.74, 361–376.Google Scholar
  6. Borman, P.,Monitoring and Analysis of the Earthquakes Swarm 1985/86 in the Region Vogtland/Western Bohemia (P. Borman, ed.) (Zentralinstitut für Physik der Erde, Potsdam 1989).Google Scholar
  7. Červený, V., andPšenčík, I.,Ray Synthetic Seismograms for Deep Receivers in 2-D Laterally Inhomogeneous Layered Media, Report No. 84 (Faculty of Mathematics and Physics of Charles University, Prague 1988).Google Scholar
  8. Evans, R. (1984),Effects of the Surface on Shear Wavetrains, Geophys. J. R. Astr. Soc.76, 165–172.Google Scholar
  9. Golicyn, B. B. (1915),O zemletrasenii 18 fevralja 1911g (in Russian). In Izd. Ross. Akad. Nauk, 1915, 9, No. 10, or also: Izbranie trudy, Izdatelstvo AN SSSR, 1960, tom II., Moskva, 365–370.Google Scholar
  10. Herrman, R. B. (1979),FASTHYPO — A Hypocentre Location Program, Earthquake Notes50 (2), 25–38.Google Scholar
  11. Horálek, J., Vavryčuk, V., Plešinger, A., Pšenčík, I., Jedlička, P., andSoukup, J.,Redefined localization of selected Jan. 5–Feb. 6, 1986 events of the West-Bohemia earthquake swarm. InEarthquake Swarm 1985/86 in Western Bohemia (D. Procházková, ed.) (Geophys. Inst. of Czechosl. Acad. Sci., Prague 1987), pp. 226–235.Google Scholar
  12. Kárník, V., Schenk, V., andSchenková, Z. (1987),Earthquake Swarm in Western Bohemia 1985/86: Some Characteristic, Annales Geophysicae5B, (6), 691–700.Google Scholar
  13. Kisslinger, C. (1980),Evaluation of S to P Amplitude Ratios for Determining Focal Mechanisms from Regional Network Observations, Bull. Seismol. Soc. Am.70, 999–1014.Google Scholar
  14. Kolář, P. (1992),Energy of Seismic Waves (in Czech), Ph.D. Thesis, Geophys. Inst. of Czechosl. Acad. Sci., Prague.Google Scholar
  15. Kolář, P. (1994),Energy of Selected Events of 1985/86 West-Bohemian Earthquake Swarm, Studia Geophys. et Geod.38, 23–36.Google Scholar
  16. Kolář, P., andVavryčuk, V. (1990),Reinterpretation of Selected Events from Western-Bohemia Earthquake Swarm 1985/86 (in Czech), Report of Geophys. Inst. of Czechosl. Acad. Sci., Prague.Google Scholar
  17. MINUIT 1984, Cern Computer Centre Program Library, B506.Google Scholar
  18. Novotný, O., andUrban, L.,Seismic models of the Bohemian massif and of some adjected regions derived from seismic sounding and surface waves investigation: A review. InInduced Seismicity and Associated Phenomena (D. Procházková, ed.) (Geophys. Inst. of Czechosl. Acad. Sci., Prague 1988) pp. 227–249.Google Scholar
  19. Procházková, D. (editor) (1988),Induced Seismicity and Associated Phenomena (Proceedings). Geophys. Inst. of Czechosl. Acad. Sci., Prague.Google Scholar
  20. Wahlström, R., andStrauch, W. (1984),A Regional Magnitude Scale for Central Europe Based on Crustal Wave Attenuation, Report No. 3-84, Seismological Department, University of Uppsala, Sweden.Google Scholar
  21. Zahradník, J. (1989),Generation of Seismic Waves by Earthquake Sources (Lecture Notes), Seismological Department, Uppsala University, Sweden.Google Scholar
  22. Zahradník, J., Vavryčuk, V., Janský, J., andZedník, J.,Focal mechanisms of selected events of the West-Bohemia earthquake swarm 1985/86 constrained by P-wave amplitudes. InInduced Seismicity and Associated Phenomena (D. Procházková, ed.) Geophys. Inst. of Czechosl. Acad. Sci., Prague 1988) pp. 271–289.Google Scholar

Copyright information

© Birkhäuser-Verlag 1994

Authors and Affiliations

  • Petr Kolář
    • 1
  1. 1.Bočni IIGeophysical InstitutePragueCzech Republic

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