摘要
首先叙述了各台台址、观测仪器及台址信度等概况,并使用了甘肃省内的地电台(武都、平凉、兰州、临夏、武威、山丹、四零四,除四零四为区域台外,其余均为省级台站)共7个定点观测台的观测资料。利用这些台的视电阻率观测结果,结合1986年以来在甘肃及邻区发生的12次MS≥5.0的地震(地震来自甘肃台网地震目录),对这些地震进行了各参数的计算及临震特征的分析,探讨其映震效果,展示其震兆异常图形,给出了每次地震在各观测台所记录的异常信息起始时间及临震特征的分析结果。经对数据的处理与震例分析,结果表明,地震异常特征出现到发震时间有一定尺度的结果,为地震中短临预报提供了参考依据。
In this paper, the sites, the observation instruments equipped with and the reliability of the geoelectric stations in Gansu province are introduced. Then, using the apparent resistivity data from seven geoelectricmeters in Wudu, Pingliang, Lanzhou, Linxia, Wuwei, Shandan and Silingsi stations, respectively, combining with the data of 12 earthquakes with MS≥5.0, Which occurred in Gansu province and neighborhood area from 1986, we calculated all parameters of the earthquakes, analyzed the characters of the critical earthquakes, studied the result of the response to the earthquake and exhibited the abnormal graph of the precursor of the earthquakes. We also give the analysis result of the beginning time of the abnormal information of each station record and the character of critical earthquake about each earthquake. The results of data processing and case study of some earthquakes shows us that there is time scale between the appearance of abnormal information and the earthquake origin time. This result can be used as a reference criterion for the medium period, short period and critical earthquake prediction.
出处
《地震地磁观测与研究》
2002年第5期14-23,共10页
Seismological and Geomagnetic Observation and Research
关键词
甘肃
地电阻率
视电阻率
映震效果
地震前兆
apparent resistivity,abnormal character,general situation of the station,effect of the response to the earthquake
