摘要
地震地下流体观测中的环境干扰问题变得越来越严重,影响了地震监测预报的效能。如何评估这种干扰,更加有效地保护台站的观测环境,是当前我国地震地下流体观测研究中的重大课题。经过一年多的研究,提出了评估地下流体观测环境的技术指标干扰度,并进一步规定了水位、水温、水氡与水汞观测环境的允许干扰度。干扰度是指各类干扰引起的异常变化幅度与正常时段最大变化幅度的相对百分比值。允许干扰度的规定,是依据各类观测得到的地震前兆异常量的大小,一般采用异常量百分比的最小值。
Interference problems are becoming more and more serious to seismic observation with subsurface fluids, which influence the effectiveness of seismic monitoring and prediction. How to assess the interference and protect the observation conditions of those stations is a big topic for seismic monitoring and research of subsurface fluids in China.After one-year study on this issue, the authors propose a technical index for assessing the observation conditions of subsurface fluids——interference degree, lhe tour mare observation items such as water level, water temperature, water radon and water mercury are all given a permit interference degree to guarantee an effective observation. The interference degree refers to the percentage of anomaly range caused by all interlerence Iactors to maximum anomaly range under normal conditions. Permit interference degree prescribes the degree of seismic anomaly range observed, generally referring to the minimum percentage of anomaly range.
出处
《地震》
CSCD
北大核心
2005年第3期63-68,共6页
Earthquake
基金
"十五"科技攻关项目(KJB2001-04)
关键词
地下流体
观测环境
干扰度
允许干扰度
Subsurface fluids
Observation conditions
Interference degree
Permit interference degree
