Unexplained Phenomena

Strange lights, mysterious events, and unexplained occurrences

Upsweep sound

Event

1 video from 1 channel

A recurring underwater sound detected by the NOAA, characterized by a series of upsweeping tones, contributing to the mystery of ocean acoustics.

A strange hum keeps coming from the deep sea, only at dawn and dusk. Scientists think it might be a "dinner bell" for…