Abstract
In rock slope analysis, formation and growth of microcracks are usually coupled with the propagation of elastic waves that can be detected by a suitable microseismic monitoring system. The correct analysis and interpretation of the recorded activity can provide information on the size and the type of the rupture mechanisms. A combination of the coherency computation and the source location techniques, typically used in seismic signal processing, is here proposed to this aim. The application to a microseismic dataset recorded by the microseismic monitoring system installed on the Matterhorn Peak, has evidenced the effectiveness of this approach. In particular the coherency has allowed to identify a set of similar appearing events, while the location of the corresponding hypocenters has evidenced the alignment of the sources on a planar surface, whose orientation is closed to the orientation of a discontinuity system resulting from a morphostructural survey.
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Acknowledgements
The authors wish to thank Marta Chiarle, Giovanni Mortara and Massimo Arattano (CNR_IRPI Torino) for the involvement in the Interreg IIIA Alcotra Project n °196 “PERMAdataROC” and the MS data sharing.
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Occhiena, C., Pirulli, M., Scavia, C. (2013). Application of a Multiplet-Location Coupled Technique to Microseismic Data for Identification of Rock Slope Active Surfaces. In: Margottini, C., Canuti, P., Sassa, K. (eds) Landslide Science and Practice. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31445-2_13
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DOI: https://doi.org/10.1007/978-3-642-31445-2_13
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