Seismic source positioning method for polar region ice layer

Abstract

The invention provides a seismic source positioning method aiming at a polar region ice layer, and provides an ice layer seismic source positioning method aiming at sound propagation characteristics in a polar region environment and polar region sea ice so as to meet potential target positioning requirements in economic development and military confrontation in the north pole region. According to the invention, the method combines the acoustic propagation characteristics of the polar ice layer, makes full use of the multi-wave phenomenon caused by the elastic waveguide, carries out the multi-dimensional difference analysis from the directions of the polarization characteristics of the wave field, the propagation speed, the amplitude and the like, and constructs an ice layer seismic source positioning method with high applicability. From the perspective of engineering application, the method does not need a sensor array, the required data acquisition requirement can be met by using a single self-contained three-component seismograph, the required equipment is highly simplified, the operation process is simple, convenient and rapid, and the polar region environment operation practicability is extremely high.

Description

technical field [0001] The invention relates to a seismic source positioning method, in particular to an ice layer seismic source positioning method based on a single three-component geophone, and belongs to the technical field of polar acoustics. Background technique [0002] Seismic source location refers to the technology of determining the direction of the excitation source based on the elastic wave field information generated under the excitation of the seismic source by using the elastic wave signal recorded by the sensor. The traditional seismic source location technology originates from seismological research, and its main application scenario is natural earthquake monitoring. The derivative applications based on this technology mostly focus on the positioning of artificial or natural seismic sources inside the formation. Traditional seismic source positioning techniques include absolute positioning, relative positioning, and nonlinear positioning. However, since the...

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Problems solved by technology

The state of Arctic sea ice is highly unstable and lacks continuous energy supply, so it is impossible to build a long-term geophone array based on fixed stations; the placement and recovery of short-term sensor arrays require a lot of manpower, and the harsh natural environment of the polar region is increasing its cost and risk while limiting the feasibility of its application

[0004] In summary, the existing seismic source location methods are difficult to meet the needs of ice source location in the polar environment, both in terms of practicability and applicability.

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