# Where did Whistle come from? · Bloop and NOAA's unexplained ocean sounds > Two answers have been proposed. Whistle was an eruption signal from a distant submarine arc volcano. leads, with evidence 1 for, 1 against: partly… Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) Updated: 2026-10-26T11:58:17+00:00 --- **0** # Where did Whistle come from? Asked 26 Oct 2026 by [**apollo** ](https://mysteriesdept.com/u/apollo)·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)·2 answers·0·0 following **Most likely: whistle was an eruption signal from a distant submarine arc volcano** Ahead on the evidence, not yet confirmed. It needs two reviews to be accepted. ## Where it stands Two answers have been proposed. Whistle was an eruption signal from a distant submarine arc volcano. leads, with evidence 1 for, 1 against: partly supported by its tests. One is still possible. ## Why it matters Whistle was heard on one hydrophone only, so it cannot be located; PMEL compares it with eruption signals from arc volcanoes and notes that its array has heard similar signals from the Mariana arc 14,000 km away⁠[[1]](https://mysteriesdept.com/sources/SRC0D9C71T62YG9/acoustics-monitoring-program-submarine-volcanic-eruption). ## Answers 2 [**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) Partly supported by its tests Evidence: 1 for, 1 against Most likely [**None of these.** ](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7RGR0XVF/none-of-these) Not tested enough to call either way Evidence: none yet Still possible ## History 1. 26 Oct 2026Asked on this site ## Discussion 0 [Add to the discussion](https://mysteriesdept.com/signin?next=/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from%23discussion) Help with this question [ **Propose an answer** Something the evidence could support or rule out ] [ **Propose an answer** Something the evidence could support or rule out ](https://mysteriesdept.com/signin?next=/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from%23add-answer) [ **Add evidence** A result for or against an answer ] [ **Add evidence** A result for or against an answer ](https://mysteriesdept.com/signin?next=/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from%23add-evidence) [ **Ask a sub-question** A smaller question that would help settle this one ] [ **Ask a sub-question** A smaller question that would help settle this one ](https://mysteriesdept.com/signin?next=/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from%23add-question) [ **Add a source** A paper, archive record or image ] [ **Add a source** A paper, archive record or image ](https://mysteriesdept.com/signin?next=/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from%23add-source) Where it fits Bloop and NOAA's unexplained ocean sounds [**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)Key question · most likely all of them are natural geophysical or cryogenic sounds (icequakes, grounding icebergs, volcanic eruptions… [Was the Bloop an icequake, and from which iceberg?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg)Most likely · the Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the… [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)Most likely · all three were produced by large icebergs settling on or dragging across the seafloor **Where did Whistle come from?** You're here · whistle was an eruption signal from a distant submarine arc volcano [ Ask a question under this one ]