💧🌏 Greg CocksFeb 27, 2025
Seismometers Reveal Earth's Longest-Runout Undersea Sediment Flows In Unprecedented Detail
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https://phys.org/news/2025-02-seismometers-reveal-earth-longest-runout.html <-- shared technical article
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https://doi.org/10.1038/s43247-025-02137-z <-- shared paper
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https://doi.org/10.1016/j.geomorph.2024.109350 <-- shared paper
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https://doi.org/10.1038/s41561-022-01017-x <-- shared paper
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#GIS #spatial #mapping #remotesensing #Congo #CongoChannel #bathymetry #seismometers #monitoring #sediment #flow #submarine #massmovement #canyon #infrastructure #pipes #cables #engineeringgeology #geology #model #current #debrisflow #bathymetric #Africa #offshore #coast #coastal #river #WestAfrica #instrumentation #acoustic #doppler #moorings #turbidity #thalweg #morphology #landslides #stratigraphy #seismic #turbiditycurrent #flow #gradient #slope #erosion #risk #hazard #spatialanalysis #spatiotemporal #seabed
Seismometers reveal Earth's longest-runout undersea sediment flows in unprecedented detail

Turbidity currents are an important natural process that often goes unnoticed: these powerful currents beneath the ocean surface carve deep submarine canyons, create huge sediment deposits and can damage submarine cables and pipelines. Although the phenomenon has been known for about 100 years, its high-energy nature has made it almost impossible to measure directly—any instruments placed in its path would be destroyed by its immense force, much like avalanches on land.

Phys.org
Hari TulsidasMay 3, 2023

Deep-sea mining could create clouds of sediment that smother life on the ocean floor. Scientists measured the plume of a prototype mining vehicle and found that it stayed close to the seabed, creating a turbidity current. The impact of such plumes on marine ecosystems is still unknown and highly debated.

#DeepSeaMining #OceanSediment #TurbidityCurrent

https://www.popsci.com/environment/deep-sea-mining-ocean-impact-sediment/

Received message.

Deep-sea mining has murky aftereffects

Mining promises to kick up a bunch of seafloor-smothering sediment. The question is, how much?

Popular Science
Show threadDr Dan ShugarNov 28, 2022
When it reached the ocean, the still-quite-turbid torrent triggered a #turbiditycurrent (underwater #avalanche) that travelled 10s of km down the #fjord. This process is explained in this superb video https://youtu.be/w120dWPlEX0
Bare Earth: When a Landslide Triggers a Tsunami

YouTube