# Its undulating single-frequency shape resembles signals from erupting arc volcanoes such as West Mata.

> Its undulating single-frequency shape resembles signals from erupting arc volcanoes such as West Mata.

Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7R1440VV/its-undulating-single-frequency-shape-resembles-signals-from  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Bloop and NOAA's unexplained ocean sounds](https://mysteriesdept.com/mysteries/noaa-ocean-sounds)Evidence

Evidence · Bloop and NOAA's unexplained ocean sounds

# Its undulating single-frequency shape resembles signals from erupting arc volcanoes such as West Mata.

Its undulating single-frequency shape resembles signals from erupting arc volcanoes such as West Mata.

Suggestive0

## What it bears on 1 answer

[Whistle was an eruption signal from a distant submarine arc volcano.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7QSA2QCN/whistle-was-an-eruption-signal-from-a-distant-submarine-arc)

Most likely

FOR

## Cite it

```
Mysteries Department. (2026). Its undulating single-frequency shape resembles signals from erupting arc volcanoes such as West Mata. [Evidence EVD0D9C7R1440VV]. https://mysteriesdept.com/r/EVD0D9C7R1440VV
```

Key

**EVD** 0D9C7R1440VV

Kind

Evidence

Tier

Suggestive

Version

1

Added by

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

The record

Every record is open data. Take this one as JSON, with its links and its history.

[JSON](https://mysteriesdept.com/api/v1/records/EVD0D9C7R1440VV)