Brazil is a country with huge mining and construction activity, two sectors that make up much of its economic base. In very active and competitive markets companies need suppliers of proven competence, tradition and trust. It is in this extremely competitive market that, since 1977, VMA – Engenharia de Explosivos e Vibrações has been developing its services and solutions, combining experience and tradition with the latest in rock blasting technology and vibration analysis and control. VMA today works with the representation of 4 international companies. Commercial representation of engineering seismographs brand INSTANTEL. Northern Light Technologies (NLT) miner's cap lamps and underground mine automation sales representative. Fragmentation analysis software from WIPWARE. E Blasting simulation and optimization software from O-PITBLAST. VMA has a range of services: Remote Online and Offline Vibration Monitoring, Seismography, Rock Blasting Engineering, Conventional and Special Dismantling, Vibration Testing, Acoustic Pressure Monitoring, Geomechanically Sensor Monitoring and geotechnics, dam monitoring, cavity monitoring, rail monitoring, urban traffic and structures. VMA also offers various training in the area. Authorized laboratory for maintenance and calibration of INSTANTEL engineering seismographs. Seismograph rental.