摘要
地震台站的地震监测能力不仅与观测仪器有关,还与台基环境干扰背景有关。台基噪声功率谱反映台基的等级和受到干扰的程度。选取呼和浩特地震台JCZ-1T数字地震仪2015年12月5日—24日钻井作业时段每天干扰最大、无地震发生的1小时数据,采用傅里叶变换,对钻井引起的噪声频谱进行分析,并计算台基平均噪声水平及动态范围变化,论述钻井对台站记录造成的干扰,对于研究地震监测干扰,采取合理、有效的解决措施,提供参考。
The monitoring ability of seismic stations is not only related to the performance of observational instrument, but also to the background level of environmental disturbance. The power spectrum of noise of the seismic station bases reflected the quality of the foundation and the extent of perturbation. In this paper, we selected the daily 1-hour observation data recorded by JCZ-1T digital seismograph at Hohehot seismic station during the well drilling period of 2015-12-05 to 2015-12-24, which was recorded when the interference was the most intensive and no earthquake was detected. The noise spectrum caused by drilling was then analyzed by Fourier transform method the background noise level of station base and the dynamic range of observational instrument are calculated, and the effects of drilling on seismic observation at Hohhot station was discussed. These results provide a reference for study of the interference of seismic observation environment and also for exploring reasonable and effective measures to eliminate it.
出处
《地震地磁观测与研究》
2016年第6期90-94,共5页
Seismological and Geomagnetic Observation and Research
基金
中国地震局2016年度测震青年专项(项目编号:20160506)
关键词
地震台
钻井
干扰
地震观测
seismic station
well drilling
interference
seismic observation
