南北地震带科学台阵台基噪声分析——以XRE、PKO、AXR台为例

The background noise analysis on the seismic array of north-south seismic belt science stations——take XRE、PKO、AXR station as examples

地震信号中总是含有噪声的,了解噪声源和掌握噪声计算方法都是很重要的。本文以"中国地震科学台阵探测——南北地震带北段"项目台基勘选为例,详细介绍了台站的勘选标准、噪声的类型以及噪声功率谱的计算方法,并以勘选数据为基础选取了其中XRE、PKO、AXR台,采用PSD算法进行台基噪声计算分析。计算结果表明:以上三台均达到了流动台站的架设标准。

Seismic signals are always contaminated with different noises. Correctly understanding and mastering the noise source calculation methods are very important. In the e work for the China Earthquake Science Array Probe Project, in the northern part of South-north Seismic Belt, we first recognize the noise types and then take the PSD as the calculation parameter. Based on the observation data, the background noise levels of XRE, PKO and AXR seismic stations satisfy the installation roles of field mobile seismic instrument.