The distribution of earthquake foci around the Hornsund fiord, south Spitsbergen, suggest the presence in this region of a micronode of geotectonic structures, exhibiting moderate dynamic activity. Dislocation description was applied to the processes of motion of the glacier and crack formation. Long-period seismic waves generated by the glacier-substratum dynamic system and impulses generates by icebergs seated on the sea bottom have been discussed.