Abstract: This study is aimed at densifying gravity stations and generating gravity baseline data for monitoring the Earth Tremor and natural disaster in Ijebu-Ode, Ogun State Nigeria. This was achieved through the densification of controls and gravity Stations within Ijebu-Ode by GNSS/GPS and Gravity observations respectively. The methodology was divided into data acquisition, data processing and results presentation and analysis. The baseline gravity data of the study were collected from field work using gravimeter and GNSS/GPS techniques while the gravity values of the reference gravity station were collected from the office of the Surveyor General of the Federation. Trimble Business centre software with its accessories for the processing of the coordinate data to obtain latitude, longitude and ellipsoidal height of the studied stations, GravSoft software and Notepad were used to process raw gravity data to correct for errors and to also obtain the gravity values of the established stations.