Abstract Using the relative gravity observation data of Hebei and surrounding areas from 2015 to 2020, we obtain the dynamic variation of the gravity field. With the polynomial fitting method to calculate annual variability, we also analyze the characteristics of the gravity field changes in Hebei. The results show that the dynamic gravity change presents obvious regional characteristics. The gravity variation is stable in the northwest, within -40~30 μGal; while in the southeast there exists a slight positive accumulation from 2015 to 2016, which spreads to the northeast, forming a NE-SW elliptical anomaly between the Tianjin-Handan area in 2020. The anomaly ranges from Yanshan in the north to Taihang mountain in the west, with a maximum difference of 120 μGal, also with a high average change rate. Combined with the water level and surface subsidence data, the gravity variation in the southeastern high-value area is mostly caused by surface subsidence, the influence of groundwater loss is covered relatively.
YANG Yahui,LIU Hongliang,ZHANG Zhanwei et al. Dynamic Variation Characteristics of Gravity Field in Hebei Area from 2015 to 2020[J]. jgg, 2023, 43(3): 303-307.
YANG Yahui,LIU Hongliang,ZHANG Zhanwei et al. Dynamic Variation Characteristics of Gravity Field in Hebei Area from 2015 to 2020[J]. jgg, 2023, 43(3): 303-307.