Articles | Volume 14, issue 2
Nonlin. Processes Geophys., 14, 103–108, 2007
https://doi.org/10.5194/npg-14-103-2007

Special issue: New developments in scaling, scale and nonlinearity in the...

Nonlin. Processes Geophys., 14, 103–108, 2007
https://doi.org/10.5194/npg-14-103-2007

  06 Mar 2007

06 Mar 2007

Anomalies of critical state in fracturing geophysical objects

A. Chmel1, V. S. Kuksenko1, V. S. Smirnov2, and N. G. Tomilin1 A. Chmel et al.
  • 1Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
  • 2Arctic and Antarctic Research Institute, 38 Bering street, 199397 St. Petersburg, Russia

Abstract. 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.