利用P波质点运动检测福建台网地震计方位角

The Azimuths of Fujian Seismic Network Detected by P-wave Particle Motion

摘要: 为提高福建台网地震计方位角的准确性，于2013年用高精度寻北仪对所属台站进行了方位角的校正工作。主要是利用P波质点运动的原理及“SNR为权重的多事件”方法，选取了全球范围M≥6.0以上的远震作为研究对象，以2013年为界，分两阶段显示福建台网所属台站方位角的变化情况，结合维护日志找出某些台站方位角偏差较大的原因，为持续提高并保持方位角的准确性排除障碍。

Abstract: In order to improve the azimuth angle accuracy of the Fujian seismic network, we used the high-precision north finder to correct the azimuth of the station in 2013. This paper mainly uses the principle of P-wave particle motion and the "SNR-weighted-multievent" method, and selects teleseisms with a global scope of M≥6.0 as the research object. Taking 2013 as the boundary, we compared the changes of the azimuth angle of the stations belonging to the Fujian network in two stages, and found out the reasons for the large deviation of the azimuth angles of some stations in combination with the maintenance log, so as to eliminate the obstacles to continuously improve and maintain the accuracy of azimuth.