海拉尔地震台阵噪声源调查

利用海拉尔地震台阵位置资料，选取台阵半径50 km范围，通过实地摸排和GPS仪定位方法，判断台阵周围有无国际标注的各大噪声源，同时计算噪声源与台阵的距离，分析台阵所属9个子台环境噪声水平，并将现今噪声功率谱与2000年时进行对比，汇总结果，并对台阵环境噪声水平进行评价。结果表明，海拉尔地震台阵周围有6类噪声源，其中工业设施和公共交通对台阵噪声水平的影响集中在高频段，但对监测能力影响不大；根据地震计安放位置与干扰源的最小距离进行评价，得出7个子台噪声源水平达到Ⅰ级台站环境地噪声水平，B₄、B₅子台处于Ⅱ级台站环境地噪声水平，台阵噪声水平总体处于良好状态，不影响仪器的正常运行。

Research on noise source in Hailar Seismic Array

In order to evaluate the environmental noise level in Hailar Seismic Array, this paper uses the location of the Hailar Seismic array to check if there are major internationally labeled noise sources within 50 km of the array through field tracking and GPS positioning methods. Meanwhile, the distances between the noise sources and the array are calculated. The environmental noise level of the 9 sub-stations of Hailar Seismic Array is studied and their current noise power spectrum is compared with that in 2000. The results show that there are 6 kinds of noise sources around the Hailar Seismic Array. The influence of industrial facilities and public transportation on the noise level of Hailar Seismic Array is concentrated in the high-frequency band, which has little influence on the monitoring capability of Hailar Seismic Array. Based on the minimum distance between the position of the seismometer and the source of disturbance, we evaluate the environmental noise level in Hailar Seismic Array. Seven sub-stations of Hailar Seismic Array reached the noise level Ⅰ; B₄ and B₅ sub-stations reached the environmental noise level Ⅱ. On the whole, the noise level of Hailar Seismic Array is generally in good condition, which does not affect the normal operation of the array instrument.