This　paper　presents　a　series　of　field　test　results　conducted　at　a　site　in　the　north　western　part　of　Singapore　to　investigate　blast-induced　ground　vibration　propagation　through　mixed　geological　media　which　comprised　of　residual　soils　and　granitic　rock.　In　total,　six　blast　tests　were　carried　out.　Tri-axial　accelerometers　were　placed　at　different　standoff　distances　from　the　blasting,　and　the　acceleration　time　histories　were　recorded　at　the　ground　surface,　at　various　depths　in　the　soil　mass,　as　well　as　in　rock　mass　to　monitor　the　vibrations.　Empirical　formulae　for　predicting　the　peak　particle　velocity　(PPV)　attenuation　along　the　ground　surface　and　in　soil/rock　were　derived　from　the　measured　data.　The　ground　vibration　attenuation　across　the　soil-rock　interface　was　carefully　examined　and　the　study　shows　that　the　soil-rock　interface　plays　a　significant　role　in　changing　the　ground　vibration　intensity.　Results　from　this　field　test　have　provided　valuable　data　for　calibration　of　numerical　models　developed　to　study　the　ground　shock　propagation.　©　2018　ISRM　&　SRMEG　(Singapore)