The survey using passive seismic, the detection of natural low frequency earth movements, usually with the purpose of discerning geological structure and locate underground oil, gas, or other resources, is very different from the conventional survey, which consists of numerous measurements that are spatially very close together and relatively short (often lasting in the order of minutes).
The survey using passive seismic, the detection of natural low frequency earth movements, usually with the purpose of discerning geological structure and locate underground oil, gas, or other resources, is very different from the conventional survey, which consists of numerous measurements that are spatially very close together and relatively short (often lasting in the order of minutes).