A series of tremors recorded in the Baltic island of Bornholm, Denmark is puzzling scientists. Its source is not ascertained and there are claims of them being caused by “acoustic pressure waves from the atmosphere”.
What do we know of the “mysterious tremors’ in Denmark?
Tremors were first recorded on Sunday after the Geological Survey of Denmark and Greenland (GUES) received over 60 tips about “earthquake-like tremors”. People in Bornholm described them as shaking and rattling, deep rumbling, and changing pressure in the ear. Initially, the authorities believed that it was a result of earthquakes. Additionally, Seismologists theorized it originated from controlled detonations in Poland. Polish authorities stated there were intensive activities in Ustka, northern Poland for the Anakonda23 exercise. It involved the live firing of artillery munitions and jet fighters.
However, on Monday, the geological authority confirmed they were “not caused by earthquakes, but by pressure waves from an event in the atmosphere.” However, their source was “unknown”. “The seismologists can report that it is unlikely that the tremors originate from a controlled explosion in Poland, which was carried out shortly before the first reports of tremors on Bornholm,” stated GEUS.
More on the unknown phenomenon
Bornholm is a rocky island in the Baltic Sea and is home to about 40,000 people. It is located north of Poland, northeast of Germany, and south of Sweden. According to media outlets in Denmark, the police received several complaints about tremors in the island’s eastern region. They also lead to cracks in the stone walls of some houses. However, no one was injured. As per the Geological Survey of Denmark and Greenland, they were measured at a magnitude of 2.3. The GUES also revealed they had two seismographs in the region for collecting data around the clock.