Summary:

- The article discusses the mysterious tremors detected in Greenland, which have puzzled scientists for years. These tremors are not caused by earthquakes but rather by some other unknown phenomenon.

- Researchers have used seismic monitoring stations to study the tremors, which occur regularly and can last for hours or even days. The tremors are concentrated in a specific region of Greenland, but their exact cause remains a mystery.

- Theories about the tremors' origins range from glacial movements to interactions between the ice sheet and the underlying bedrock. Further research is needed to unravel this scientific puzzle and better understand the processes shaping Greenland's dynamic landscape.