After 15 years of investigation, new research using advanced sonar and sub-bottom profiling technology confirms the Baltic Sea Anomaly is not a natural geological formation. Discovered in 2011 by Dennis Asberg, the object exhibits unusual electromagnetic properties, structural features, and has been monitored by NATO vessels, raising questions about its origin and government knowledge.
In 2011, a Swedish deep sea recovery group led by Dennis Asberg discovered an unusual circular object on sonar screens 90 meters below the surface of the Baltic Sea. Initially dismissed and ridiculed, this object, now known as the Baltic Sea Anomaly, has been the subject of intense investigation and speculation for over a decade. Recent research conducted by Stockholm University has provided new scientific evidence that the anomaly is not a natural geological formation, reigniting interest and debate about its true nature.
Dennis Asberg and his team from Ocean X were searching for a shipwreck when the side scan sonar detected the anomaly. The object is approximately 60 meters in diameter, covering 3,000 square meters of ocean floor, located in international waters between Sweden and Finland. The sonar images baffled marine experts across the United States, Australia, and Europe, as no known natural or man-made object matched the anomaly’s characteristics.
Veteran diver Stefan Hoberg, who has conducted thousands of dives, described the dive to the anomaly in 2012 as the most important of his career. He observed flat walls, corridors, and 90-degree angles—features inconsistent with natural rock formations. The surface was dark gray and almost black, too hard to extract samples from. Additionally, water temperature readings near the object were nearly 0 degrees Celsius, whereas normal temperatures at that depth in the Baltic Sea range between 4 and 5 degrees Celsius.
After years of skepticism and personal threats, Stockholm University provided Dennis with a research vessel, professional equipment, and scientists willing to investigate the anomaly without bias. The team employed multi-beam sonar and sub-bottom profiling technology to study the object in detail.
Sub-bottom profiling works like radar, penetrating the seabed to reveal layers beneath the surface. The data showed that the anomaly is sitting on top of the seabed, distinctly separated from the geological layers below. This separation confirms that the object is not part of the natural bedrock or a geological formation but appears to have been placed there.
Dennis and his team have documented electromagnetic anomalies around the object for over a decade. During expeditions, remotely operated vehicles (ROVs) experienced sudden failures: cameras and lights stopped working, and GPS functions malfunctioned when positioned above the anomaly. These electromagnetic disturbances are consistent across multiple expeditions, different equipment, and teams.
Radar readings also showed unexplained dots resembling ships appearing and disappearing erratically, even when no vessels were present. These phenomena suggest the presence of unusual electromagnetic or magnetic fields around the anomaly.
One of the most intriguing features of the anomaly is a hole approximately 20 centimeters in diameter with a frame around it. Divers observed sediment moving rhythmically in and out of this opening, as if the object were "breathing." Tests on loose material near the anomaly revealed organic burned material, confirmed by laboratories in Israel. This finding is significant because the Baltic Sea at that location is essentially devoid of biological activity.
Early exploration revealed that several NATO vessels, including French, German, British, and American ships, were encircling the site. A Swedish naval ship also approached and stopped in the dive pattern area, despite having no operational reason to be in Finnish economic waters.
Dennis reported a meeting at the Swedish military headquarters where he confronted officials about their surveillance activities. The officials denied having been to the site, despite evidence of their presence. The only expedition without military surveillance was the June 2025 survey aboard a Swedish government-owned vessel.
The presence of multiple NATO countries monitoring the anomaly raises questions about what governments already know and why this information has been suppressed for over a decade.
The Baltic Sea Anomaly remains one of the most mysterious underwater discoveries of recent times. New scientific data confirms that it is not a natural geological formation but an object placed on the seabed with unusual electromagnetic properties and structural features. The involvement of military vessels and the suppression of information add layers of intrigue.
As Dennis Asberg continues to make all data publicly available, the world watches closely, waiting for definitive answers. Whether the anomaly is a crashed UFO or an unknown man-made object, its discovery challenges our understanding of the underwater world and the secrets it may hold.
Does the new sub-bottom profiling data showing the anomaly’s separation from the seafloor change your perspective on what it might be? Share your thoughts and theories as this fascinating investigation unfolds.
Keep your eyes on the skies and the seas, as mysteries like the Baltic Sea Anomaly remind us that there is still much to discover beneath the surface.
