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Method and system for obtaining seismic parameter estimation

A technology of seismic parameter estimation and seismogram, applied in seismology, seismic measurement, seismic signal processing, etc., can solve the problems of differences and inability to quickly determine the location, magnitude, and focal mechanism of earthquake events

Active Publication Date: 2020-11-24
UNIV OF SCI & TECH OF CHINA
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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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  • Method and system for obtaining seismic parameter estimation
  • Method and system for obtaining seismic parameter estimation
  • Method and system for obtaining seismic parameter estimation

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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0040] Seismic events are caused by a sudden change in the medium structure in a certain local area inside the earth. Seismic events are caused by the instantaneous rupture of rock formations underground. The source information of an earthquake can be represented by longitude, latitude, depth, magnitude, strike angle, dip angle, and slip angle of the earthquake rupture surface. A seismogram is a time series signal. Each earthquake corresponds to a unique seismogram, such as longitudinal waves, shear waves, surface waves and the time when the seismic waves reach the seismic receiving instrument. Therefore, the source information of the earthquake can be deduced from the seismogram. What the seismic station or seismograp...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/00G01V1/28G01V1/30G06F16/901
CPCG01V1/288G01V1/307G06F16/9027G01V2210/63G01V2210/6161G01V1/01
Inventor 张捷朱慧宇
Owner UNIV OF SCI & TECH OF CHINA
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