Microgravity is a precision surveying technique set apart from gravity method, used in shallow subsurface investigations. PBG Ltd. has been providing gravity and microgravity surveys for over 50 years applying the services to geological, geotechnical and environmental issues. 

Microgravity surveys identify changes (variations) in the subsurface soil and rock density. Basing on microgravity data GRAVITY ANOMALY MAP is produced which indicates anomalous area  - potential voids, sinkholes or post-mining deformations.

APPLICATIONS

• • sinkhole hazards assessment (mining areas)

  • detecting sub-surface voids and cavities 

  • locating old mine workings and tunnels

  • tracing micro-tectonic features and variations in sub-surface density

  • identifying possible collapses due to karst activity