A kind of warning method of earthquake event in specific area
A technology for specific regions and events, applied to alarms, instruments, etc., can solve problems such as failure to form events, high time costs, and occurrences, and achieve the effects of perfect monitoring capabilities, small calculations, and simple processes
Active Publication Date: 2018-12-11
CTBT BEIJING NAT DATA CENT
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However, the time cost of this method is high, which affects the response speed to the nuclear explosion event in a specific area
In addition, under the reality that the seismic monitoring network of the International Monitoring System of the Comprehensive Nuclear-Test-Ban Treaty is sparse, it is difficult for small underground nuclear tests to be monitored by multiple seismic stations in the international monitoring network. Might not be able to form an event to appear in the event detection list
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[0054]According to the above method, real-time processing is carried out on the array data for a specific area. First, the real-time data of each sub-station of the array is read, and the azimuth and slowness results of the signal with the largest energy in the data are calculated through F-K analysis. According to the azimuth angle Perform F-K beamforming on the array and the slowness calculation results to obtain the beamforming channel results, then perform STA / LTA signal detection calculations on the beamforming channel results, and finally compare the calculated azimuth, slowness, and signal results with the preset Threshold value is compared, and an event alarm is given for the signal that meets the conditions.
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The invention relates to a specific region earthquake event alarm method. The method includes, at first, selecting an appropriate alarm array within a given time period and a specific area; reading the real-time data of each substation of the alarm array, and performing the real-time F-K calculation to obtain the azimuth and slowness result of the maximum energy signal in the data; and clustering the alarm array data to obtain the clustering channel result according to the obtained azimuth and slowness calculation result, comparing the calculated azimuth, slowness and signal detection results with pre-set thresholds, and performing event alarm on the eligible signals. The flow is concise, the computational complexity is less, and the method is easy to implement. The method solves the technical problem of array data processing for specific region nuclear explosion earthquake event alarm, further completes the monitoring capability of specific region nuclear explosion events, and has an important meaning in overseas underground nuclear test inspection.
Description
technical field [0001] The invention belongs to the field of seismic array data processing and relates to an alarm 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 nuclear explosion seismic events generated by underground nuclear tests. The seismic event detection method adopted by the existing seismic data processing system is global grid search, and the seismic station monitoring The data is used for signal detection, and after calculating the signal characteristics, the near-seismic and far-seismic classification and relative grouping of seismic phases are carried out. The signals are correlated through the global grid file, and the event detection list is obtained after iteratively performing event assumptions and redundant event elimination. In the monitoring of nuclear explosion and earthquake events in a specific area, by searching...
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IPC IPC(8): G08B21/10
CPCG08B21/10
Inventor 刘哲函唐伟王晓明刘俊民王燕李靓王媛
Owner CTBT BEIJING NAT DATA CENT