An evaluation approach for the terrestrial gravity measurement based on the seismic noise magnitude

In this paper, we calculated the seismic noise magnitude （SNM） of four types of relative gravimeters （GS-15, gPhone, PET and CG-5） commonly used in terrestrial gravity measurement in different environments and time intervals, and compared the corresponding results. The results show that there is quite different in sensitivity to ambient noise for the metallic spring gravimeter （GS-15, gPhone, PET） and quartz spring gravimeter （CG-5）. The SNM results are similar using the data of the quietest five-day or quietest one-day to evaluate. Therefore, it is feasible to use the quietest one-day recording to evaluate SNM value and observation precision. This result could provide a method for evaluating the conditions of the campaigned gravity survey station.