Abstract
An adjustable pneumatic generator of acoustic signals with shock excitation was developed. Measuring and computing complex was also created to investigate elastic acoustic wave propagation along ice surface. Experiments on low-frequency acoustic signal propagation from the pneumatic generator were carried out in «water-ice-air» system. The possibility to apply the developed measuring and computing complex for physical modeling of acoustic wave propagation from earthquake sources along ice cover was confirmed.
Highlights
The paper [1] experimentally proves that deformation-acoustic activity which appears before earthquakes may be considered as a complex precursor of a seismic event
The aim of the paper is the development of a measuring and computing complex to investigate the interactions of elastic waves with ice layer in real conditions
In order to investigate elastic wave propagation, we suggest providing the air generator with a system for interpulse period control
Summary
The paper [1] experimentally proves that deformation-acoustic activity which appears before earthquakes may be considered as a complex precursor of a seismic event. In Arctic conditions, there is a necessity to record earthquake sources located under the ice far from coastline. Such a question statement requires recording of hydroacoustic waves taking into account their interactions with ice surface. The papers [6, 7] present mathematical models for acoustic signal propagation taking into account reflections at the boundary of two mediums. Applicability of such models in practice requires additional investigation with consideration to real conditions
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