# Was the Bloop an icequake, and from which iceberg? · Bloop and NOAA's unexplained ocean sounds > Four answers have been proposed. The Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the… leads… Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg Publisher: Mysteries Department Licence: CC BY 4.0 (credit Mysteries Department and link the page) Updated: 2026-10-26T11:58:17+00:00 --- **0** # Was the Bloop an icequake, and from which iceberg? 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)·4 answers·0·0 following **Most likely: the Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the…** Ahead on the evidence, not yet confirmed. It needs two reviews to be accepted. ## Where it stands Four answers have been proposed. The Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the… leads, with evidence 3 for, 1 against: supported by its tests. Three are still possible. ## Why it matters The Bloop carries the case's fame and its attribution is the most cited. NOAA's two pages give different dates for the identification (2005 by the Ocean Service; comparison with 2008 recordings on PMEL's page), and the source iceberg has never been named⁠[[1]](https://mysteriesdept.com/sources/SRC0D9C72SE163B/what-is-the-bloop)⁠[[2]](https://mysteriesdept.com/sources/SRC0D9C70TY0F01/acoustics-monitoring-program-icequakes-bloop). ## Answers 4 [**The Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the…** ](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7GYJ6Y2Y/the-bloop-was-one-or-more-icequakes-from-a-large-iceberg) Supported by its tests Evidence: 3 for, 1 against Most likely [**None of these.** ](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7KCP2NHA/none-of-these) Not tested enough to call either way Evidence: none yet Still possible [**The Bloop was an ice sound of another kind, such as calving from an ice shelf or a collision between bergs,…** ](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7J5M4BVS/the-bloop-was-an-ice-sound-of-another-kind-such-as-calving) Not tested enough to call either way Evidence: 2 for Still possible [**The Bloop was not made by ice.** ](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7JX21WY2/the-bloop-was-not-made-by-ice) Failed a test; not refuted outright Evidence: 1 for Disputed ## History 1. 2001[CNN: fox suspected ice calving by 2001 because the sound always came from the south.](https://mysteriesdept.com/sources/SRC0D9C75FC7Z2D/scientists-tune-in-to-sounds-of-the-sea)For: The Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the… 1. 2002[CNN puts forward: the Bloop was not made by ice.](https://mysteriesdept.com/sources/SRC0D9C75Q645CK/tuning-in-to-a-deep-sea-monster) 1. 2002[CNN: it was described in 2002 as unidentified and possibly biological.](https://mysteriesdept.com/sources/SRC0D9C75Q645CK/tuning-in-to-a-deep-sea-monster)For: The Bloop was not made by ice. 1. 2013[Dziak et al.: icequakes from iceberg breakup are broadband and recorded at long range.](https://mysteriesdept.com/sources/SRC0D9C73GW1MV0/life-and-death-sounds-of-iceberg-a53a)For: The Bloop was one or more icequakes from a large iceberg cracking somewhere between Bransfield Strait and the… 1. 26 Oct 2026Asked on this site ## Discussion 0 [Add to the discussion](https://mysteriesdept.com/signin?next=/mysteries/noaa-ocean-sounds/questions/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg%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/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg%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/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg%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/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg%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/QST0D9C7CHY4R4M/was-the-bloop-an-icequake-and-from-which-iceberg%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?** You're here · 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?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7D9C6V99/where-did-whistle-come-from)Most likely · whistle was an eruption signal from a distant submarine arc volcano [ Ask a question under this one ]