Abstract

As an important geophysical fundamental field, the geomagnetic field is widely used in the fields of geoscientific research, mineral exploration, space weather monitoring, earthquake monitoring and forecasting. More and more geomagnetic earthquake precursor anomaly information has been found in the study of seismomagnetic relationship. However, the reliability of anomaly information is often limited by the number of observation points. In view of the high construction cost, large land acquisition area and construction difficulties of the existing traditional geomagnetic station observation mode, which restricts the construction of high-density geomagnetic measurement points, the development of low-cost buried dense geomagnetic observation platform array is very necessary. To scientifically design the dense geomagnetic observatory array and seek the optimal solution of construction cost and observation data quality, this paper elaborates on the status and development trend of geomagnetic array observation technology from the perspective of array observation mode and measurement point observation technology. In this paper, the development status and shortcomings of the continuous observation mode of fixed measurement points, the periodic re-measurement mode of fixed measurement points, as well as the development status and shortcomings of the strict magnetic house-type measurement point observation technology and the simple buried measurement point observation technology are summarized in detail, to provide reference for the design of the dense geomagnetic observation station array.

Keywords:Dense geomagnetic array; Array observation mode; Observation technology