Spatio‐temporal analysis of stress diffusion in a mining‐induced seismicity system | Zendy

Marsan David | Zendy; Bean Christopher J. | Zendy; Steacy Sandy | Zendy; McCloskey John | Zendy

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

Author(s) -

Marsan David,

Bean Christopher J.,

Steacy Sandy,

McCloskey John

Publication year - 1999

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/1999gl010829

Subject(s) - induced seismicity , geology , diffusion , seismology , exponent , event (particle physics) , uncorrelated , fractal , fault (geology) , scale (ratio) , anomalous diffusion , statistical physics , geophysics , physics , geography , mathematics , cartography , statistics , computer science , innovation diffusion , mathematical analysis , linguistics , philosophy , quantum mechanics , thermodynamics , knowledge management

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 ) ∼ 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.

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