摘要
为分析1993年3月份出现的香河-宝坻地磁异常,于1993年4月份进行了专门的观测研究,内容包括:仪器与测点环境的考察,测点周围磁场梯度测量,布设4个临时台站的连续观测与对香河-宝坻测线进行了3次的加强测量。结果表明,仪器性能稳定可靠,测点环境良好,测点周围磁场梯度符合要求。地磁总强度观测资料的差值比较与FFT分析的结果,没有明显异常显示,原有异常已恢复。此地磁异常及其恢复,可能是该局部地区地下应力变化的某种反映。
In order to research the geomagnetic anomaly occurred in March, 1993 in the Xianghe-Baodi region, the special investigation was carried out in April, 1993. The investigation included: checking up the magnetometers, investigation the environmental condition of the sites and measuring the magnetic gradient around the sites, the continuous observation at 4 temporal stations and 3 intensive surveys in the Xianghe-Baodi profile. The results show that the magnetometers are stable and reliable, the environmental condition is good, the magnetic gradients around the sites agree with the requirement.The results of the difference comparison and FFT analysis for the observational data of geomagnetic total intensity show that there was no anomaly and the anomaly occurred in March, 1993 already recovered The geomagnetic anomaly and its recovery perhaps is the reflection of some stress change underneath the region.
出处
《地震地磁观测与研究》
1993年第6期56-61,共6页
Seismological and Geomagnetic Observation and Research
关键词
地磁
地震观测
地磁观测
geomagnetic anomaly, seismomagnetic precursor, Xianghe-Baodi region
