应城地磁台电磁观测环境测试

Environmental Test and Analysis on Electromagnetic Observation at Yingcheng Geomagnetic Station

对应城地磁台的地质条件、地磁场观测环境、背景噪声及其他电磁环境等进行测试和分析。结果表明,应城地磁台地处灰岩区,台站磁场水平梯度≤1nT/m,电磁环境噪声≤0.1nT,电磁环境稳定。经地层钻孔岩性分析,该台土层磁性较强,对台站建设有不利影响,建议台站勘选前要重视土层磁性的检测工作。

Geological conditions, observation environment of geomagnetic field, background noise and other electromagnetic environment aspects are tested and analyzed at Yingcheng station. The results showed that Yingcheng geomagnetic station is located in the limestone area, and that the horizontal gradient of the magnetic field is less than or equal to 1 nT/m, and that the electromagnetic background noise is less than or equal to 1 nT. The test results show that, based on borehole lithology analysis, the electromagnetic environment is stable but the soil of the station is affected with strong magnetism. It is suggested the soil magnetism detection work should precede station construction.