Spatio-temporal analysis of stress diffusion in a mining-induced seismicity system

D Marsan, CJ Bean, S Steacy, J McCloskey

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    Abstract

    The spatio-temporal correlation of micro-earthquakes occuring in a mining-induced seismic system (Creighton mine, Ontario, Canada) is investigated. It is shown that, when considering only the after-events correlated to a main event, i.e., not accounting for the uncorrelated regime of `background' activity, the spatial distribution of these after-events occuring at t after the main event change with t. This change takes the form of an expanding pattern, characterized by a typical scale L-c(t) varying as L-c(t) similar to t(H), H being estimated to 0.18. This diffusion exponent is found to increase when considering only a subset of the most energetic events as mainshocks. We interpret this result as the indication of a stress (sub-)diffusion mechanism, involving propagation on the heterogeneous fractal fault network.
    Original languageEnglish
    Pages (from-to)3697-3700
    JournalGeophysical Research Letters
    Volume26
    Issue number24
    Publication statusPublished - Dec 1999

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    Marsan, D., Bean, CJ., Steacy, S., & McCloskey, J. (1999). Spatio-temporal analysis of stress diffusion in a mining-induced seismicity system. Geophysical Research Letters, 26(24), 3697-3700.