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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.