The Deep Ocean Signal They Still Can’t Explain… In 1997, an extremely powerful underwater signal was recorded in the Pacific Ocean. It came from nearly 8,000 meters below the surface. It was louder than any known marine animal. The frequency didn’t match known biological patterns. The ocean floor at that depth is still largely unexplored. To this day, no confirmed explanation exists. Was it geological? Unknown marine life? Or something we are not supposed to understand yet? A full investigation