Anomalies of critical state in fracturing geophysical objects
Non-linear time-sequences of fracture-related events were studied in drifting sea-ice and fracturing rock. A reversible drop of the b-value was detected prior to the large-scale sea-ice cover fragmentation, when the time sequence of impact interactions between ice-fields was fully decorrelated. A si...
| Published in: | Nonlinear Processes in Geophysics |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Copernicus Publications
2007
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| Subjects: | |
| Online Access: | https://doi.org/10.5194/npg-14-103-2007 https://noa.gwlb.de/receive/cop_mods_00032596 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00032550/npg-14-103-2007.pdf https://npg.copernicus.org/articles/14/103/2007/npg-14-103-2007.pdf |
| Summary: | Non-linear time-sequences of fracture-related events were studied in drifting sea-ice and fracturing rock. A reversible drop of the b-value was detected prior to the large-scale sea-ice cover fragmentation, when the time sequence of impact interactions between ice-fields was fully decorrelated. A similar loss of the temporal invariance of the fracture process was revealed in the time sequence of microfracture events detected in a loaded rock sample. These temporal gaps in the continuous critical state of the considered self-organizing, open systems were attributed to the property of hierarchicity inherent in the geophysical objects. A combination of scaling and hierarchic features in the behavior of fracturing solids manifests itself in the heterogeneity of the temporal pattern of fracture process. |
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