Every few years, mysterious signals appear from the depths of the ocean

 The US submarine detection system recorded a pulsating signal at a depth of 8 kilometers, in the Pacific Ocean, where there are no nearby islands. Starting to check the data with the archives to identify the source, the military found that such signals had already been in the past, and the first was recorded 54 years ago.

The stored information in archival documents indicates several cases of receiving anomalous signals from great depths. But none of them could be explained.

In 1977, a radio operator on a ship in the middle of the Atlantic Ocean received a strange signal from a depth of 8 kilometers.

It follows from the documents that the military carried out studies of the ocean floor in the area after receiving acoustic anomalies, but the results of these studies were not published.

This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system SOSUS in August, 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each. The source level is high enough to be recorded throughout the Pacific. ...<<<Read More>>>...