# All three were produced by large icebergs settling on or dragging across the seafloor.

> Most likely: All three were produced by large icebergs settling on or dragging across the seafloor.

Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7PAE07W8/all-three-were-produced-by-large-icebergs-settling-on-or  
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)[Were Train, Slow Down and Julia made by icebergs grounding on the seafloor?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7D1J3NMQ/were-train-slow-down-and-julia-made-by-icebergs-grounding-on)Answer

Answer · Bloop and NOAA's unexplained ocean sounds

# All three were produced by large icebergs settling on or dragging across the seafloor.

All three were produced by large icebergs settling on or dragging across the seafloor.

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

## Where it stands

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

## What it predicts

- Large icebergs were in shallow water along each bearing on the recorded dates.
- The spectra match harmonic tremor and grounding signals recorded from bergs under observation.

## What would rule it out

- No large berg in water shallow enough to ground along any of the bearings on those dates.

## Evidence 2 for · 1 against

[Grounded and drifting bergs produce long-range hydroacoustic signals catalogued in the southern Indian and…](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7PT23NWW/grounded-and-drifting-bergs-produce-long-range-hydroacoustic)

Established

FOR

[Iceberg A53a produced harmonic tremor while scraping shoals, recorded on nearby hydrophones.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7PJ80V8E/iceberg-a53a-produced-harmonic-tremor-while-scraping-shoals)

Established

FOR

[Julia's bearing is uncertain enough to span Bransfield Strait to Cape Adare.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7Q1W6D71/julias-bearing-is-uncertain-enough-to-span-bransfield-strait)

Established

AGAINST

## The questions it answers

[Were Train, Slow Down and Julia made by icebergs grounding on the seafloor?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7D1J3NMQ/were-train-slow-down-and-julia-made-by-icebergs-grounding-on)

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 likelyAll three were produced by large icebergs settling on or dragging across the seafloor

## Cite it

```
Mysteries Department. (2026). All three were produced by large icebergs settling on or dragging across the seafloor. [Answer ANS0D9C7PAE07W8]. https://mysteriesdept.com/r/ANS0D9C7PAE07W8
```

Key

**ANS** 0D9C7PAE07W8

Kind

Answer · hypothesis

Origin

Published

Version

1

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