Mastodawn

Giant ‘Gravity Hole’ in the Ocean May Be the Ghost of an Ancient Sea
--
https://www.scientificamerican.com/article/giant-gravity-hole-in-the-ocean-may-be-the-ghost-of-an-ancient-sea1/ <-- shared technical media article
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https://doi.org/10.1029/2022GL102694 <-- shared 2023 paper
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https://oceanservice.noaa.gov/facts/geoid.html <-- technical description of a geoid
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[theories abound]
"... KEY POINTS
• Employing time dependent global mantle convection models since the Cretaceous. [the authors] simulate the origin of the enigmatic Indian Ocean geoid low
• Plumes forming along the edges of the African Large Low Shear Velocity province (LLSVP) control the regional geoid in the Indian Ocean
• These plumes, in turn are generated by lower mantle Tethyan slabs that perturb the African LLSVP…”
#GIS #spatial #mapping #geoid #gravity #mapping #global #remotesensing #plume #ocean #ancientocean #gravityhole #geophysics #IndianOcean #geology #structuralgeology #crust #mantle #core #high #low #potsdamgravitypotato #IOGL #tomography #model #modeling #plate #tectonicplate #Tethys #slab #mantleplume #LLSVP #AfricanLargeLowShearVelocity

Stefan Bohacek Jul 24, 2024

Oh huh.

https://www.cnn.com/2023/07/24/world/gravity-hole-geoid-low-indian-ocean-scn/index.html

"The “gravity hole” in the Indian Ocean — officially called the Indian Ocean geoid low — is the lowest point in that geoid and its biggest gravitational anomaly, forming a circular depression that starts just off India’s southern tip and covers about 1.2 million square miles (3 million square kilometers)."

More on this phenomenon: https://en.wikipedia.org/wiki/Gravity_anomaly

#science #gravity #GravityAnomaly #GravityHole #TIL

There is a ‘gravity hole’ in the Indian Ocean, and scientists now think they know why

An anomaly known as the geoid low has long puzzled geologists. One team has found what it believes is a credible explanation, and it’s coming from deep inside Earth.

CNN

Matt Willemsen Nov 7, 2023

The Mystery of the World’s Largest and Deepest Gravity Hole
The sea level here is hundreds of feet lower than the rest of the ocean.
https://www.atlasobscura.com/articles/gravity-hole-indian-ocean #IndianOcean #GravityHole #gravitational #anomaly #geoid #low

The Mystery of the World’s Largest and Deepest Gravity Hole

The sea level here is hundreds of feet lower than the rest of the ocean.

Atlas Obscura

Matt Willemsen Nov 7, 2023

The Mystery of the World’s Largest and Deepest Gravity Hole

The sea level here is hundreds of feet lower than the rest of the ocean.

Atlas Obscura

𝑪𝒉𝒓𝒊𝒔 𝑻𝒉𝒐𝒓𝒏𝒆®Jul 24, 2023

👇🌏"There is a ‘gravity hole’ in the Indian Ocean, and scientists now think they know why" #IndianOcean
#GravityHole
https://www.cnn.com/2023/07/24/world/gravity-hole-geoid-low-indian-ocean-scn/index.html

Knowledge Zone Jul 7, 2023

#IISc Scientists Trace the Origin of the Massive '#GravityHole' in the Indian #Ocean : Misc

#Hunger and #Famine are not accidents — they are created by the actions of people : Nature

3 Tragic Consequences of #GlobalWarming on #Ocean #Biodiversity : Medium

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The AEGIS Alliance Jul 6, 2023

Massive ‘Gravity Hole’ in Indian Ocean may have been caused by ancient sea that sank millions of years ago

#gravity #GravityHole #indianocean #ocean #Science #sciencenews
https://theaegisalliance.com/2023/07/06/massive-gravity-hole-in-indian-ocean-may-have-been-caused-by-ancient-sea-that-sank-millions-of-years-ago/?feed_id=11842&_unique_id=64a71a001e5e4

Massive ‘Gravity Hole’ in Indian Ocean may have been caused by ancient sea that sank millions of years ago

Learn about the massive 'Gravity Hole' in the Indian Ocean, potentially caused by an ancient sea that sank millions of years ago. Recent research suggests that this gravitational irregularity originated from the remains of the primordial Tethys Ocean.

Christopher Miller Jul 2, 2023

I had no idea that gravity on earth fluctuated that much.

The Indian Ocean has low density matter beneath it that causes it to be 100m lower than if it were average gravity at sea level.

Giant ‘Gravity Hole’ in the Ocean May Be the Ghost of an Ancient Sea:
https://www.scientificamerican.com/article/giant-gravity-hole-in-the-ocean-may-be-the-ghost-of-an-ancient-sea1/

#News #Newstodon #NewsTooter #Science #GravityHole

Giant ‘Gravity Hole’ in the Ocean May Be the Ghost of an Ancient Sea

A vast expanse of the Indian Ocean is a staggering 100 meters lower than the global average sea level because of a major dip in Earth’s gravity. Scientists now think they know the cause

Scientific American