Application And Study Of Digital Data From Seismic Array(Network)

The application and study of digital seismic data is of great importance not only in theory but also in practice. Now seismology has undergone a technological revolution. The development of a new generation of seismometers and digital recording systems with very broad bandwidth and high dynamic range, modern monitoring system can capture all spectrum seismic wave include strong motion and small motion. Shanghai seismic array monitoring systems have seismic array, seismic network and Sheshan seismic station of China Digital Seismic Network(CDSN). It is very important to solve daily seismic monitoring and basis study and application study of geophysics using those seismic data.In this paper, Shanghai seismic array calibration and its application in Shanghai seismic array, seismic coda wave, P-wave attenuation and seismic source parameters are studied using the broadband digital data recorded by Shanghai seismic array and seismic network.The main research result and conclusion of this paper are as follows:1. Shanghai seismic array calibrationIn this paper, by theoretical analysis of many teleseismic events in the globe range recorded by Shanghai network, we gave the method of seismic calibration such as Nearest-Calibration and Average-Calibration, and Shanghai seismic array calibration picture are figured according to the events. At that time, the calibration pointed out the velocity asymmetry below the array and calibrated the events location results and would improve the precision of location results in the future.2. Seismic source parametersThe seismic source parameters are studied by the analysis of the local earthquakes recorded by the network in Shanghai . And by means of the Brune Model the parameters related to seismic P-wave are obtained, which the relationships between such as source radius, source moment and magnitude .