1887
Volume 58, Issue 5
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

We have developed a method that enables computing double‐couple focal mechanisms with only a few sensors. This method is based on a non‐linear inversion of the P, Sv and Sh amplitudes of microseismic events recorded on a set of sensors. The information brought by the focal mechanism enables determining the geometry of the rupture on the associated geological structure. It also provides a better estimate of the conventional source parameters. Full analysis has been performed on a data set of 15 microseismic events recorded in the brine production field of Vauvert. The microseismic monitoring network consisted of two permanent tools and one temporary borehole string. The majority of the focal mechanisms computed from both permanent tools are similar to those computed from the whole network. This result indicates that the double‐couple focal mechanism determination is reliable for both permanent 3C receivers in this field.

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2010-06-29
2024-03-28
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References

  1. AbercrombieR.1995. Earthquake source scaling relationships from 1 to 5 M_L using seismograms recorded at 2.5‐km depth. Journal of Geophysical Research100, 24015–24036.
    [Google Scholar]
  2. AkiK. and RichardsP.1980. Quantitative Seismology: Theory and Methods . W.H. Freeman and Co.
    [Google Scholar]
  3. BohnhoffM., BaischS. and HarjesH.‐P.2004. Fault mechanisms of induced seismicity at the superdeep German Continental Deep Drilling Program (KTB) borehole and their relation to fault structure and stress field. Journal of Geophysical Research109, B02309. doi:101029/2003JB002528
    [Google Scholar]
  4. BooreD. and BoatwrightJ.1984. Average body‐wave radiation coefficients. Bulletin of the Seismological Society of America74, 1615–1621.
    [Google Scholar]
  5. BruneJ.1970. Tectonic stress and the spectra of seismic shear waves from earthquakes. Journal of Geophysical Research75, 4997–5009.
    [Google Scholar]
  6. CharletyJ., CuenotN., DorbathL., DorbathC., HaesslerH. and FrogneuxM.2007. Large earthquakes during hydraulic stimulations at the geothermal site of Soultz‐sous‐Forêts. International Journal of Rock Mechanics and Mining Sciences44, 1091–1105.
    [Google Scholar]
  7. ClouserR.H.1992. Estimating the hypocenter and mechanism of the August 15, 1991 Centre Hall, Pennsylvania earthquake using single‐station data. Seismological Research Letters63, 541–555.
    [Google Scholar]
  8. DeshayesP.2008. Tomographie en vitesse et en atténuation de la zone de subduction au Chili central – ouest de l’Argentine (29S‐34S) à partir de données sismologiques locales: apport à l’étude de la composition minéralogique . PhD thesis, University of Nice‐Sophia Antipolis .
  9. GodanoM., RegnierM., DeschampsA., BardainneT. and GaucherE.2009. Focal mechanisms from sparse observations by non‐linear inversion of amplitudes: Method and tests on synthetic and real data. Bulletin of the Seismological Society of America99, 2243–2264.
    [Google Scholar]
  10. HanksT. and KanamoriH.1979. A moment magnitude scale. Journal of Geophysical Research84, 2348–2350.
    [Google Scholar]
  11. HardebeckJ. and ShearerP.2003. Using S/P amplitude ratios to constrain focal mechanisms of small earthquakes. Bulletin of the Seismological Society of America93, 2434–2444.
    [Google Scholar]
  12. KirkpatrickS., GelattC. and VecchiM.1983. Optimization by simulated annealing. Science220, 671–680.
    [Google Scholar]
  13. KolářP.2000. Two attempts of study of seismic source from teleseismic data by simulated annealing non‐linear inversion. Journal of Seismology4, 197–213.
    [Google Scholar]
  14. LomaxA., VirieuxJ., VolantP. and BergeC.2000. Probabilistic earthquake location in 3D and layered models: Introduction of a Metropolis‐Gibbs method and comparison with linear locations. In: Advances in Seismic Event Location (eds C.Thurber and N.Rabinowitz ), pp. 101–134. Kluwer Academic Publishers.
    [Google Scholar]
  15. MadariagaR.1976. Dynamics of an expanding circular fault. Bulletin of the Seismological Society of America66, 639–666.
    [Google Scholar]
  16. MaisonsC., FortierE. and ValetteM.1997. Induced microseismicity and procedure for closure of brine production caverns. Pure and Applied Geophysics150, 585–603.
    [Google Scholar]
  17. SnokeJ.A.2003. FOCMEC: FOCal MEChanism determination. In: International Handbook of Earthquake & Engineering Seismology, Part B (eds W.H.K.Lee , H.Kanamori , P.C.Jennings and C.Kisslinger ). Elsevier.
    [Google Scholar]
  18. ValetteM.1991. Etude structurale du gisement salifère Oligocène de Vauvert (Gard) . PhD thesis, University of Montpellier II .
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  • Article Type: Research Article
Keyword(s): Focal mechanism; Induced seismicity; Toolstring

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