Abstract
Abstract
The influence of the background environment on absolute gravity values cannot be ignored. Based on multi-source data between 2013 and 2023 (including absolute gravity, Global Navigation Satellite System (GNSS) observation, underground fluid and rainfall, and vertical gravity gradient data), this paper calculated the influence of changes in the background environment on absolute gravity values and conducted linear fitting and analysis. The results indicated that the average annual rate of change in absolute gravity, underground fluid, and surface deformation at the Wuhan Jiufeng Seismic Station was − 0.1141 µGal/y, -0.5233m/y, and − 0.0016mm/y, respectively. Changes caused by various environmental factors were deducted from the measured absolute gravity values to obtain relatively reasonable and accurate absolute gravity values. Based on the research data and results, the trend of the underground movements of materials was analysed. This provides a theoretical basis for error correction and gravitational reference values for calibrating absolute gravity values at the Wuhan Jiufeng Seismic Station in the future.
Publisher
Research Square Platform LLC
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