An analysis of the process of acceleration of seismic energy emission in laboratory experiments on destruction of rocks and before strong earthquakeson Kamchatka and in Italy

The time-to-failure model is a technique in which a failure function is fit ted to a time series of accumulated Benioff strain before a large earthquak e. We analyze the relation of the time-to-failure model to the hypothesis o f fractal structure of seismicity. A power law failure function (Varnes, 19 89; Bufe and Varnes, 1993) and its log-periodic generalization Somette and Sammis, 1995 are discussed. The results of application of the log-periodic time-to-failure model to the analysis of the process of acceleration of sei smic energy emission in the laboratory experiments on rock destruction and before strong earthquakes on Kamchatka and in Italy are presented. (C) 2001 Elsevier Science B.V. All rights reserved.