Pre-earthquake signals – Part I: Deviatoric stresses turn rocks into a source of electric currents

  title={Pre-earthquake signals – Part I: Deviatoric stresses turn rocks into a source of electric currents},
  author={Friedemann T. Freund},
  journal={Natural Hazards and Earth System Sciences},
  • F. Freund
  • Published 2007
  • Geology
  • Natural Hazards and Earth System Sciences
Abstract. Earthquakes are feared because they often strike so suddenly. Yet, there are innumerable reports of pre-earthquake signals. Widespread disagreement exists in the geoscience community how these signals can be generated in the Earth's crust and whether they are early warning signs, related to the build-up of tectonic stresses before major seismic events. Progress in understanding and eventually using these signals has been slow because the underlying physical process or processes are… Expand

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