Study On The Survey Of Shaanxi Earthquake Early Warning Stations

The frequency of earthquakes in China is high,and most of the earthquake damages are severe.Earthquake disasters are becoming more and more threatening to people’s lives,property and economic development.In 2015,China begins to build national earthquake intensity quick report and early warning system.Through the construction of national earthquake early warning system,the ability of earthquake intensity quick report and earthquake early warning can be obtained,and The system provides strong guarantee for reducing the threat of earthquake disaster.There are 612 new stations to be surveyed in Shaanxi Province,of which 127 stations need field test.In order to ensure the observation efficiency of the new survey stations in Shaanxi Province,it is necessary to test the ground pulsation noise of the site and analyze the test results.First of all,the paper studies and divides the layout characteristics of the reference stations and basic stations in Shaanxi,and obtains the distribution of different types of stations in different regions.Secondly,according to the reference station and the basic station two kinds of stations,respectively discusses the survey results,including the site distribution,the environmental noise analysis and research,the results show that the more compact and hard the foundation is,the lower the ambient ground pulsation noise is,and the weaker the amplification effect of the ground motion noise is.Finally,the paper makes a comprehensive analysis on the distribution of stations and the environmental noise of reference stations,and based on the calculation and analysis of the environmental ground pulsation noise data,earthquake magnitude formula and seismic gauge function,the estimated value of the minimum magnitude that can be monitored by the earthquake monitoring stations at the specified epicenter distance is obtained,and the monitoring capacity of Shaanxi earthquake early warning network is estimated and analyzed.At the same time,the paper compares and analyzes the monitoring capability of the network calculated by the National Seismic gauge function and the Shaanxi regional seismic gauge function,and obtains the similarities and differences between them.The calculation results show that the calculation results of the regional gauge function and the national gauge function are basically consistent,but the former can more truly reflect the actual situation of Shaanxi,and the monitoring capacity division in some regions is more precise and clear,which is more precise than the results calculated by the national gauge function.Comparing the monitoring capacity of the existing seismic network with the estimated monitoring capacity of the early warning network,it can be seen that the monitoring capacity of the early warning network has been significantly improved.