Space-time interaction amongst clusters of mining induced seismicity |
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Authors: | A Kijko C W Funk |
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Institution: | (1) Council for Geoscience, Geological Survey of South Africa, Private Bag X112, 0001 Pretoria, USA;(2) ISS International Ltd, P. O. Box 2083, 9460 Welkom, Republic of South Africa |
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Abstract: | Elementary cluster analysis of induced seismicity in a South African gold mine has shown that there is a clear interaction amongst the clusters; and that the level of the interaction is a function of the distance. The clusering algorithm used is an adaptation of the single-link cluster analysis which considers both three-dimensional space and time. A high level of interaction between the clusters is demonstrated from the cross-correlation analysis of seismic activity rates and radiated energy. A distinct decrease in the value of correlation coefficients was detectable as distance increased. This was somewhat surprising, considering the simplicity of the technique used. Since no attempt is made to study the physical mechanisms of interaction, these results are very preliminary, but interesting from an observational point of view. |
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Keywords: | Induced seismicity clustering space-time interaction |
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