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S Lherminier1, R Planet1, V Levy Dit Vehel1

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Summary
This summary is machine-generated.

This study presents a novel shear experiment that accurately models earthquake laws. The system reproduces seismic event energies, foreshocks, aftershocks, and memory effects observed in real earthquakes.

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Area of Science:

  • Physics
  • Geophysics
  • Complex Systems

Background:

  • Seismicity exhibits complex statistical laws.
  • Understanding earthquake precursors and aftershocks is crucial.
  • Previous models have limitations in reproducing diverse seismic features.

Purpose of the Study:

  • To develop a physical model that quantitatively reproduces key seismicity laws.
  • To investigate the role of force networks in seismic event dynamics.
  • To explore memory effects and quiescence preceding major seismic events.

Main Methods:

  • A shear experiment using a compressed monolayer of disks in a ringlike geometry.
  • Continuous, slow shearing to induce frictional failures.
  • Analysis of event energies, foreshocks, aftershocks, and interevent times.

Main Results:

  • Frictional failure energies follow the Gutenberg-Richter law.
  • Foreshocks and aftershocks adhere to Omori laws.
  • Interevent times demonstrate memory of past events, mirroring earthquake statistics.
  • Qualitative reproduction of quiescence preceding main shocks and magnitude correlations.

Conclusions:

  • The shear experiment provides a quantitative model for seismicity.
  • Force network dynamics are key to understanding frictional thresholds and seismic behavior.
  • The system exhibits memory, crucial for understanding earthquake sequences.