Cycles of ice pack fragmentation in the Arctic Ocean are caused by the irregular dri dynamics. In February 2004, the Russian ice-research camp North Pole 32 established on a �oe in the Arctic Ocean ceased its working activity and was abandoned aer a catastrophic icequake. In this communication, the data collected during the last month of the �eld observations were used for calculating the changes in the kinetic energy of the ice �oe. e energy distribution functions corresponding to periods of different dri intensity were analyzed using the Tsallis statistics, which allow one to assess a degree of deviation of an open dynamic system, such as the driing ice, from its equilibrium state. e obtained results evidenced that the above-mentioned critical fragmentation has occurred in the period of substantially nonequilibrium dynamics of the system of ice �oes. e determination of the state of the pack (in the sense of its equilibrium/nonequilibrium) could provide some useful information on forthcoming icequakes.
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