They called it the Great bloop. A follow-up to an earlier discovered, “Big Bloop”. It came from a place in the ocean farthest from any landmass. 47°9’S, 126°43’W. The bottom of the Pacific ocean. It was detected by sonar buoys in Alaska. This caused a huge stir up in the scientific community.
How could something be so loud? There was practically a fleet of scientific and naval vessels investigating the area. I was on one of those vessels. We found that there was extreme seismic activity far below the surface on the ocean floor. The geologists rushed to the scene. They determined it to be a newly discovered geothermal hotspot. This theory was proven wrong after it persisted with no volcanic eruptions due to pressure.