Today, quartz crystal clocks are generally used on the seismograph stations. 目前，地震台站一般采用石英晶体钟。
In this article we have made analyses and comparisons of synchronized data from an extensometer and a 4-component borehole strainmeter at Yingkou seismological station. 摘要本文对先后安装在营口地震台的伸缩仪和分量钻孔应变仪的同步观测数据进行了比对和分析。
