0:00 / 0:29
0:00Spectrogram, 0 to 1.3 kHz0:29
Long trains of narrowband sounds rising in frequency, seasonal, located roughly at 54°S 140°W. PMEL lists its origin as unresolved.
NOAA Pacific Marine Environmental Laboratory, 1991. Public domain
Copies 2
AudioNOAA Pacific Marine Environmental Laboratory · pmel.noaa.gov · Public domain (US government work)Primary source: Acoustics Monitoring Program: Upsweep2 steps from the original
DocumentNOAA Pacific Marine Environmental Laboratory · pmel.noaa.gov · Public domain (US government work)Primary source: Acoustics Monitoring Program: Upsweep2 steps from the original
Where it was recorded
Upsweep source region, about 54°S 140°W · Open ocean (approximate location)
Sources 1
Cite it
Mysteries Department. (2026). The Upsweep recording [Artifact ART0D9C7TF8459E]. https://mysteriesdept.com/r/ART0D9C7TF8459E
@misc{mysteriesdept_art0d9c7tf8459e,
title = {The Upsweep recording},
author = {{Mysteries Department}},
year = {2026},
note = {Artifact, catalog key ART0D9C7TF8459E},
url = {https://mysteriesdept.com/r/ART0D9C7TF8459E}
}