QuestionsBloop and NOAA's unexplained ocean soundsWhat made the loud unidentified sounds recorded by NOAA's Pacific hydrophones in the 1990s?Answer
Answer · Bloop and NOAA's unexplained ocean sounds
All of them are natural geophysical or cryogenic sounds (icequakes, grounding icebergs, volcanic eruptions…
All of them are natural geophysical or cryogenic sounds (icequakes, grounding icebergs, volcanic eruptions and tremor).
Where it stands
Most likelyIts tests partly supported it: four pieces of evidence for, one against. It needs two reviews to be accepted.
What it predicts
- Each sound's bearing points to a region with ice or active volcanoes at the recorded time.
- Each spectrogram falls inside the range of modern labelled recordings of ice or volcanic sources.
- Similar sounds recur in later records from the same directions.
What would rule it out
- A sound whose recomputed bearing and spectrum fit no known ice or volcanic source, and which recurs with a pattern no ice or volcano follows.
Evidence 4 for · 1 against
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The questions it answers
Most likelyAll of them are natural geophysical or cryogenic sounds (icequakes, grounding icebergs, volcanic eruptions…
Cite it
Mysteries Department. (2026). All of them are natural geophysical or cryogenic sounds (icequakes, grounding icebergs, volcanic eruptions… [Answer ANS0D9C7DH635Z3]. https://mysteriesdept.com/r/ANS0D9C7DH635Z3
@misc{mysteriesdept_ans0d9c7dh635z3,
title = {All of them are natural geophysical or cryogenic sounds (icequakes, grounding icebergs, volcanic eruptions…},
author = {{Mysteries Department}},
year = {2026},
note = {Answer, catalog key ANS0D9C7DH635Z3},
url = {https://mysteriesdept.com/r/ANS0D9C7DH635Z3}
}