# Upsweep is narrowband and regular, unlike broadband icequakes.

> Upsweep is narrowband and regular, unlike broadband icequakes.

Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7NB60VFT/upsweep-is-narrowband-and-regular-unlike-broadband-icequakes  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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

Evidence · Bloop and NOAA's unexplained ocean sounds

# Upsweep is narrowband and regular, unlike broadband icequakes.

Upsweep is narrowband and regular, unlike broadband icequakes.

Suggestive0

## What it bears on 1 answer

[Upsweep is an ice sound, its seasonality driven by the annual cycle of iceberg drift and breakup.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7MKR0P6H/upsweep-is-an-ice-sound-its-seasonality-driven-by-the-annual)

Still possible

AGAINST

## Cite it

```
Mysteries Department. (2026). Upsweep is narrowband and regular, unlike broadband icequakes. [Evidence EVD0D9C7NB60VFT]. https://mysteriesdept.com/r/EVD0D9C7NB60VFT
```

Key

**EVD** 0D9C7NB60VFT

Kind

Evidence

Tier

Suggestive

Version

1

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