Method and system for obtaining seismic parameter estimation

Abstract

The invention provides a method and a system for obtaining seismic parameter estimation, and the method comprises the steps: carrying out the compressed sensing of a sparse seismic signal in seismic map data, and constructing a seismic map database; performing space division on the complete signal of the seismic map database, and establishing a first index; performing compressed sensing on sparseseismic signals in the seismic wave travel time information, and constructing a seismic wave travel time table; performing space division on the complete signal of the seismic travel time table, and establishing a second index; inputting seismic event information, and performing parallel search in the seismic map database and the seismic travel time table through the first index and the second index to obtain a search result set; and determining matched seismic map data and seismic wave travel time information from the search result set, and obtaining seismic parameter estimation of the seismic event from the matched seismic map data and seismic wave travel time information. According to the method, the seismic map database and the seismic wave travel time table are constructed by adoptinga compressed sensing technology, the influence of model difference on a search result can be reduced, and the estimation of seismic parameters is obtained.

Description

technical field [0001] The invention relates to the technical field of earthquake monitoring, in particular to a method and system for rapidly obtaining seismic parameter estimation of earthquake events. Background technique [0002] Earthquakes are caused by sudden changes in the medium structure of a local area inside the earth, including natural earthquakes and artificial earthquakes. The occurrence of an earthquake is a process in which energy is released inside the earth. The release of energy is transmitted and diffused in the form of seismic waves. [0003] When an earthquake occurs, the seismic waveform signal corresponding to the earthquake will be recorded by the seismic monitoring station (seismic wave receiving instrument). Seismic waveforms contain a wealth of earthquake source information (earthquake location, earthquake magnitude, and earthquake focal mechanism, etc.). We want to determine the location, magnitude, and focal mechanism of the seismic event as...

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Problems solved by technology

[0007] In view of the above problems, the present invention provides a method and system for obtaining seismic parameter estimation, which is used to at least partially solve the problem that the calculation of traditional seismic waveforms will have differences due to the application of different one-dimensional velocity models, and the seismic events cannot be quickly judged Technical issues such as the location, magnitude, and focal mechanism of the earthquake

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