Nonlinear oscillating structures in the earthquake and seaquake dynamics.
The article deals with the problem of parametric excitation of oscillating structures during an earthquake and a seaquake associated with external forces. Tidal forces and their linear and nonlinear components are considered as possible causes of earthquakes. A seaquake is regarded as a typical large-scale structural disturbance of the water surface resulting from the ocean bottom earthquake. There are given results of original laboratory seaquake modeling where wave structures with hexagonal and square cells appeared. The received wave lattices were similar to Faraday ripples, but with the size of cells from 15 to 120 mm. These experiments provided parameters on transition from a wave structure to chaos. Comparison of laboratory experimental data with descriptions of full-scale seaquakes and parametric wave theory has confirmed the submitted interpretation of the phenomenon. (c) 1996 American Institute of Physics.
Levin
Boris W.
BW
P. P. Shirshov Oceanology Institute of Russian Academy of Science, 23 Krasikova Str., 117218, Moscow, Russia.