Design and implementation of low-cost geomagnetic field monitoring equipment for high-density deployment

适于野外高密度部署的低成本地磁场监测设备的设计与实现

The observation of geomagnetic field variations is an important approach to studying earthquake precursors.Since 1987,the China Earthquake Administration has explored this seismomagnetic relationship.In particular,they studied local magnetic field anomalies over the Chinese mainland for earthquake prediction.Owing to the years of research on the seismomagnetic relationship,earthquake prediction experts have concluded that the compressive magnetic effect,tectonic magnetic effect,electric magnetic fluid effect,and other factors contribute to preearthquake magnetic anomalies.However,this involves a small magnitude of magnetic field changes.It is difficult to relate them to the abnormal changes of the extremely large magnetic field in regions with extreme earthquakes owing to the high cost of professional geomagnetic equipment,thereby limiting large-scale deployment.Moreover,it is difficult to obtain strong magnetic field changes before an earthquake.The Tianjin Earthquake Agency has developed low-cost geomagnetic field observation equipment through the Beijing–Tianjin–Hebei geomagnetic equipment test project.The new system was used to test the availability of equipment and determine the findings based on big data..

观测地磁场变化是开展地震前兆研究的一种重要手段,中国地震局自1987年开始探索震磁关系,研究中国内地地区局部磁场异常变化现象,并开展实验性地震预报研究工作。地震预报专家通过多年来对震磁关系的研究,总结出多项理论支持震前磁异常这一现象,但所涉及磁场变化量级较小,难以解释极震区特大磁场异常变化现象。主要原因为观测地磁场的专业设备成本高,不能进行大批量部署,很难在震中恰有观测点位去监测地震发生前强磁场变化。天津市地震局通过“京津冀”地磁设备试验项目研制了低成本地磁场观测设备,并进行了局部区域的高密度部署,用于验证设备的可用性和基于大数据的地磁场观测数据分析方法。