Groningen Sound

Groningen Sound is a natural acoustic phenomenon in the Groningen region of the Netherlands, characterized by a mysterious humming or droning noise often heard during calm, cold weather. It is believed to originate from underground geological processes, such as the interaction of gases or the movement of air and water within the subsurface, which create vibrations that are transmitted through the ground and emitted as sound. The phenomenon is not harmful and has puzzled residents and scientists alike, contributing to local folklore. Despite investigations, the exact cause remains uncertain, making Groningen Sound an intriguing example of natural acoustic mysteries.