Nature 252, 549 - 552 (13 December 1974); doi:10.1038/252549a0

Seismic precursors before rock failures in mines

B. T. Brady

United States Department of Interior, Bureau of Mines, Denver Mining Research Center, Denver, Colorado^*
*Present address.

Seismic precursors (such as anomalous V_p values and/or seismic activity) whose behaviour is qualitatively similar to those reported to precede earthquakes are observed before rock failures in dry underground mines. Similar processes may be involved during failure of rock in the mine and the earthquake, and diffusion of fluids into the focal region of a potential earthquake may not be a necessary condition to produce most of the precursors reported.

References

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