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A Location Method for Seismic Events in Specific Regions

A technology of a specific region and positioning method, applied in seismology, seismic measurement, seismic signal processing, etc., can solve the problem that earthquake events cannot be quickly monitored and positioned, and achieve the effect of solving the problem of inability to quickly monitor and position, simple process, and small amount of calculation.

Active Publication Date: 2018-10-23
CTBT BEIJING NAT DATA CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a positioning method for seismic events in a specific area, which solves the technical problem that seismic events in a specific area cannot be quickly monitored and located under the condition that repeated seismic events occur in a specific area

Method used

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  • A Location Method for Seismic Events in Specific Regions
  • A Location Method for Seismic Events in Specific Regions
  • A Location Method for Seismic Events in Specific Regions

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Embodiment

[0036] Following the method described above, a localization test was carried out for repeated seismic events in a specific area. First search the historical earthquake events and associated seismic stations in the historical earthquake event database according to the area of ​​the specific area, and establish the earthquake monitoring network for the specific area according to the above channel selection method; Calculate the average velocity of P waves from each station to the area based on the P wave seismic phase detection information of the station; divide the designated area into a grid to obtain the grid file of the area; in the real-time monitoring of seismic events in a specific area In the case of conforming to the seismic phase travel time difference alarm, according to the detection time of the P wave signal of each station, the average velocity of the P wave and the regional grid point file, the seismic occurrence time of each hypothetical event grid point is pushed...

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Abstract

The invention relates to a positioning method for seismic events in a specific area. First, appropriate seismic stations are selected to establish a rapid monitoring seismic network; the average velocity of the first P-wave seismic phase of each station in the seismic network is calculated; The specific area being monitored is divided into grid points, and the seismic onset time of the event is estimated based on the first-arrival P wave seismic phase detection time of the station and a certain grid point; the contribution of each station that detects the event to the estimated event seismic time is calculated. mean and variance; then select the grid point with the smallest variance as the epicenter location of the event, and its corresponding mean value is the event's seismic time, thereby locating the earthquake event. The present invention proposes a regional fine grid search and positioning method under the condition that repeated earthquake events occur in a specific area. The process is simple, the calculation amount is small, it is easy to implement and the positioning is accurate. It solves the technical problems of rapid monitoring and positioning of earthquake events in specific areas.

Description

technical field [0001] The invention belongs to the field of earthquake detection, and in particular relates to a positioning method for earthquake events in a specific area. Background technique [0002] Seismic monitoring is the main technology stipulated in the Comprehensive Nuclear Test Ban Treaty to monitor the nuclear explosion seismic events produced by underground nuclear tests. The positioning method adopted by the existing seismic data processing system is the global grid search (Global Association, referred to as GA). By extracting The arrival time difference of the P seismic phase and the S seismic phase detected by the three stations with the earliest arrival time is drawn and crossed to determine the initial positioning area, and the initial grid point position is selected according to the least squares principle, and then the arrival time of other stations is used to determine the initial positioning area. The information iterates the grid points, and finally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/00G01V1/30
CPCG01V1/307G01V2210/65G01V2210/63G01V1/01
Inventor 刘哲函王晓明唐伟刘俊民王燕李靓王媛
Owner CTBT BEIJING NAT DATA CENT
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