# Iceberg A53a produced harmonic tremor while scraping shoals, recorded on nearby hydrophones.

> Iceberg A53a produced harmonic tremor while scraping shoals, recorded on nearby hydrophones.

Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7PJ80V8E/iceberg-a53a-produced-harmonic-tremor-while-scraping-shoals  
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

# Iceberg A53a produced harmonic tremor while scraping shoals, recorded on nearby hydrophones.

Iceberg A53a produced harmonic tremor while scraping shoals, recorded on nearby hydrophones.

Established0

## What it bears on 1 answer

[All three were produced by large icebergs settling on or dragging across the seafloor.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7PAE07W8/all-three-were-produced-by-large-icebergs-settling-on-or)

Most likely

FOR

## Cite it

```
Mysteries Department. (2026). Iceberg A53a produced harmonic tremor while scraping shoals, recorded on nearby hydrophones. [Evidence EVD0D9C7PJ80V8E]. https://mysteriesdept.com/r/EVD0D9C7PJ80V8E
```

Key

**EVD** 0D9C7PJ80V8E

Kind

Evidence

Tier

Established

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/EVD0D9C7PJ80V8E)