Seismograph Azimuth Correction for Xichang Seismic Network
ZHANG Zhengwei
YANG Honggang
Abstract：According to the work requirements of the measurement and correction of the azimuth of the seismic network, Xichang seismic network does azimuth correction, azimuth sign installation and output polarity detection of seismic instrument by using the STH-2 type gyro north finder. Through the comparison of two methods of the gyroscope north finder and geological compass location geographic north direction, result shows that the method of using the gyro north seeking instrument has high accuracy, and is not affected by the external magnetic field or other environmental interference. In practical work, the azimuth deviation of most seismic stations exceeds the standard requirements. After correction, the azimuth deviation of the seismic station is less than 1o, which accords with the requirements of the standard specification, and also further improves the reliability of seismic observation data of Xichang seismic network and the seismic analysis accuracy.
Keywords：Seismic stationGyro north-finderAzimuthPolarity
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 96-100 )