Oscillating Load-Induced Acoustic Emission in Laboratory Experiment

  • A. Ponomarev
  • D. Lockner
  • S. Stroganova
  • S. Stanchits
  • V. Smirnov
Chapter
Part of the Geoplanet: Earth and Planetary Sciences book series (GEPS)

Abstract

Spatial and temporal patterns of acoustic emission (AE) were studied. A pre-fractured cylinder of granite was loaded in a triaxial machine at 160 MPa confining pressure until stick-slip events occurred. The experiments were conducted at a constant strain rate of 10−7 s−1 that was modulated by small-amplitude sinusoidal oscillations with periods of 175 and 570 seconds. Amplitude of the oscillations was a few percent of the total load and was intended to simulate periodic loading observed in nature (e.g., earth tides or other sources). An ultrasonic acquisition system with 13 piezosensors recorded acoustic emissions that were generated during deformation of the sample. We observed a correlation between AE response and sinusoidal loading. The effect was more pronounced for higher frequency of the modulating force. A time-space spectral analysis for a “point” process was used to investigate details of the periodic AE components. The main result of the study was the correlation of oscillations of acoustic activity synchronized with the applied oscillating load. The intensity of the correlated AE activity was most pronounced in the “aftershock” sequences that followed large-amplitude AE events. We suggest that this is due to the higher strain-sensitivity of the failure area when the sample is in a transient, unstable mode. We also found that the synchronization of AE activity with the oscillating external load nearly disappeared in the period immediately after the stick-slip events and gradually recovered with further loading.

Keywords

Acoustic Emission Stress Drop Aftershock Sequence Acoustic Emission Event Earth Tide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Atlas of temporal variations of natural, antropogenic and social processes. V.2. M., Scientific World. 432 p., 1988 (in Russian).Google Scholar
  2. Atlas of temporal variations in natural, antropogenic and social processes. V.3. M., Janus-K, 676 p., 2002 (in Russian).Google Scholar
  3. Beeler, N. M., and D. A. Lockner. Why earthquakes correlate weakly with the solid Earth tides: Effects of periodic stress on the rate and probability of earthquake occurrence, J. Geophys. Res., 108(B8), 2391, doi:10.1029/2001JB001518, 2003.CrossRefGoogle Scholar
  4. Cochran, E. S, J. E. Vidale and S. Tanaka. Earth tides can trigger shallow thrust fault earthquakes, Science, 306, 1164–1166, 2004.CrossRefGoogle Scholar
  5. Gomberg, J., N. M. Beeler, M. L. Blanpied, and P. Bodin. Earthquake triggering by transient and static deformations, J. Geophys. Res., 103, 24411 –24426, 1998.CrossRefGoogle Scholar
  6. Lockner, D. A., and N. M. Beeler. Premonitory slip and tidal triggering of earthquakes, J. Geophys. Res., 104, 20133–20151, 1999.CrossRefGoogle Scholar
  7. Lockner, D. A.. The role of acoustic emission in the study of rock fracture, Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 30, 883–899, 1993.CrossRefGoogle Scholar
  8. Lockner, D. A., J. D. Byerlee, V. Kuksenko, A. Ponomarev, and A. Sidorin. Quasi-static fault growth and shear fracture, Nature, 350, 39–42, 1991.CrossRefGoogle Scholar
  9. Lyubushin A.A., V.F.Pisarenko, V.V.Ruzich and V.Yu.Buddo. A New method for identifying seismicity periodicities – Volcanology and Seismology, vol.20, 1998, pp. 73–89.Google Scholar
  10. Sadovsky M.A., Mirzoev K.N, Negmatullaev S.Kh., Salomov N.G. Influence of mechanical microoscillations on the feature of material plastic strain. Solid Earth, N 6, 1981, 32–42, 1981 (in Russian).Google Scholar
  11. Sobolev G.A., Ponomarev A.V., Koltzov A.V. and Smirnov V.B. Simulation of triggering earthquakes in the laboratory. PAGEOPH, v.147, N 2, 1996, p.345–355.CrossRefGoogle Scholar
  12. Thompson, B. D., R. P. Young and D. A. Lockner, Observations of premonitory acoustic emission and slip nucleation during a stick slip experiment in smooth faulted Westerly granite, Geophys. Res. Lett., 32, doi:10.1029/2005GL022750, 2005.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • A. Ponomarev
    • 1
  • D. Lockner
    • 2
  • S. Stroganova
    • 1
  • S. Stanchits
    • 3
  • V. Smirnov
    • 1
    • 4
  1. 1.Schmidt Institute of Physics of the EarthRussian Academy of SciencesMoscowRussia
  2. 2.USGSMenlo ParkUSA
  3. 3.GFZPotsdamGermany
  4. 4.Moscow State UniversityMoscowRussia

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