A recent study published in Geophysical Research Letters has uncovered new insights into one of Earth’s most puzzling ...

The ground may feel steady underfoot, but the planet is always in motion. While satellites and sensors have mapped the ...

To better understand the changes to the geoid, NGS performed a survey in Alaska to obtain geodetic data as part of its GeMS program. On May 12, 2022, Kevin Ahlgren, a geodesist at NGS, described in a ...

NGS’ 2018 experimental geoid model, xGeoid18, and the next hybrid geoid model, Geoid18, are not the same. This column will address the latest experimental geoid model, xGeoid18, and the future hybrid ...

If the Earth’s surface were an actual geoid, then the direction of “down” would point perpendicularly toward the geoid surface (or, in the same vein, if you had a carpenter’s level, the ...

“But the geoid low in the Indian Ocean is one of the most profound gravitational anomalies on our planet.” The gravity hole likely took its current shape about 20 million years ago and will ...

The Earth’s geoid is the shape the planet would assume if its surface were made of water. Naturally, there’s little dispute over the shape of the geoid over the oceans, where it varies by only ...

'Indian Ocean Geoid Low' is a gravitational anomaly about 700 miles from India; It's a region where the water level is around 340 feet lower due to lower gravity; ...

A map of the geoid would be irregular but very smooth, with the same gravitational potential at every point. If you know what your geoid looks like, you can establish a universal system for the ...

The Indian Ocean geoid low (IOGL) is a 1.2 million-square-mile (3 million square kilometers) depression found 746 miles (1,200 kilometers) southwest of India.

“A geoid low or negative geoid anomaly would be caused by a mass deficit within the deep mantle,” Ghosh says.. “Our study explains this low with hotter, lighter material stretching from a ...

Recalculation of the Potsdam geoid shows time-dependent variation of gravity. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2011 / 06 / 110629124456.htm.