Mysterious Organic Compounds Discovered Over 7,500 Feet Underground in Finland Volatile organic compounds were found in Finland within a borehole extending over two kilometers deep. Volatile organic compounds (VOCs), commonly associated with poor indoor air quality and industrial pollution, have been discovered in a borehole more than two kilometers deep in Finland. This site had previously yielded groundwater estimated to be tens of millions of years old. While VOCs are often linked to human activities, they also occur naturally in environments such as wetlands, forests, volcanoes, and hydrothermal vents.
Researchers from the University of Helsinki and VTT Technical Research Centre of Finland collected gas and microbial samples from the borehole, which was drilled by the Geological Survey of Finland (GTK) for research purposes in Outokumpu, a region known for its ore deposits. A wide range of natural VOCs were found in bedrock groundwater from depths ranging between 500 and 2,300 meters.
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