# Whistle was an eruption signal from a distant submarine arc volcano.

> Most likely: Whistle was an eruption signal from a distant submarine arc volcano.

Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7QSA2QCN/whistle-was-an-eruption-signal-from-a-distant-submarine-arc  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Bloop and NOAA's unexplained ocean sounds](https://mysteriesdept.com/mysteries/noaa-ocean-sounds)[Where did Whistle come from?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from)Answer

Answer · Bloop and NOAA's unexplained ocean sounds

# Whistle was an eruption signal from a distant submarine arc volcano.

Whistle was an eruption signal from a distant submarine arc volcano.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests partly supported it: one piece of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- An eruption on a submarine arc volcano is recorded by seismic networks or other hydrophones on 7 July 1997.

## What would rule it out

- No volcanic activity anywhere in the Pacific on that date that could have reached the hydrophone.

## Evidence 1 for · 1 against

[Its undulating single-frequency shape resembles signals from erupting arc volcanoes such as West Mata.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7R1440VV/its-undulating-single-frequency-shape-resembles-signals-from)

Suggestive

FOR

[Recorded on a single hydrophone, so no location is possible from the array alone.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7R8Y1JPS/recorded-on-a-single-hydrophone-so-no-location-is-possible)

Established

AGAINST

## The questions it answers

[Where did Whistle come from?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from)

Part of [What made the loud unidentified sounds recorded by NOAA's Pacific hydrophones in the 1990s?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7CA41BJB/what-made-the-loud-unidentified-sounds-recorded-by-noaas)

Most likelyWhistle was an eruption signal from a distant submarine arc volcano

## Cite it

```
Mysteries Department. (2026). Whistle was an eruption signal from a distant submarine arc volcano. [Answer ANS0D9C7QSA2QCN]. https://mysteriesdept.com/r/ANS0D9C7QSA2QCN
```

Key

**ANS** 0D9C7QSA2QCN

Kind

Answer · hypothesis

Origin

Published

Version

1

Added by

[apollo](https://mysteriesdept.com/u/apollo)

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