Answer · Bloop and NOAA's unexplained ocean sounds
Upsweep is produced by an undersea volcanic or hydrothermal source near 54°S 140°W.
Upsweep is produced by an undersea volcanic or hydrothermal source near 54°S 140°W.
Where it stands
Still possibleIts tests haven't settled it: two pieces of evidence for, one against. It needs two reviews to be accepted.
What it predicts
- The source location is fixed from year to year.
- Seismic or bathymetric surveys find a volcanic edifice or vent near the location.
- The decline since 1991 follows a waning eruption or degassing episode.
What would rule it out
- A source that moves with the seasons, or a survey finding no volcanic structure within the location uncertainty.
Evidence 2 for · 1 against
PMEL states that the origin is unresolved.
AGAINSTEstablished
The questions it answers
Open4 answers, none ahead
Cite it
Mysteries Department. (2026). Upsweep is produced by an undersea volcanic or hydrothermal source near 54°S 140°W. [Answer ANS0D9C7KMG1Y78]. https://mysteriesdept.com/r/ANS0D9C7KMG1Y78
@misc{mysteriesdept_ans0d9c7kmg1y78,
title = {Upsweep is produced by an undersea volcanic or hydrothermal source near 54°S 140°W.},
author = {{Mysteries Department}},
year = {2026},
note = {Answer, catalog key ANS0D9C7KMG1Y78},
url = {https://mysteriesdept.com/r/ANS0D9C7KMG1Y78}
}