Joint Analysis of Regional Strain Variations Based on Borehole Strainmeter and Global Navigation Satellite System Observations

Several different types of crustal deformation sensors have been deployed in mainland China and have produced a massive amount of crustal deformation data. By fusing the data from sensors with different frequencies, positions, depths, and precisions, the comprehensive characteristics of the overall regional deformation can be revealed. In this study, we used near-surface and surface deformation sensors for Xinzhou area, Shanxi Province, China, which include a four-gauge borehole strainmeter (FGBS) and a global navigation satellite system (GNSS) receiver at different depths, respectively, to analyze the deformation in the study area. A joint analysis of the principal strain time series was conducted through strain conversion, and it was found that the study area is currently in a stable compressive state. It is concluded that GNSS and FGBS sensors can be deployed at the same station to facilitate the 3D observation and collaborative analysis of surface and shallow surface deformation.