[UPDATE (April 5, 2011): It turns out some of the descriptions I used below to describe a geoid were not accurate. I refer you to this page at the University of Oklahoma for a good description. I’ve ...

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 100 ...

The region of lower gravity, discovered in 1948, manifests as a vast depression in the ocean's surface that reaches some 348 feet deep at its greatest extent. A mysterious “gravity hole” in the Indian ...

Editor’s Note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. There is a “gravity hole” in the Indian ...

Credit: International Centre for Global Earth Models (ICGEM) / E. S., Barthelmes, F., Reißland, S., Elger, Like all scientific mysteries, the Indian Ocean geoid low (IOGL) — also known as the Indian ...

For over seventy years, a mysterious gravitational depression beneath the Indian Ocean has baffled scientists. Known as the Indian Ocean Geoid Low (IOGL), it marks the deepest point in Earth’s gravity ...

The Indian Ocean geoid low is one of the most profound gravitational anomalies on Earth. Earth is often depicted as a perfect sphere. But in reality, the planet's shape is irregular, much like a ...

The ground beneath your feet may feel solid, but Earth is constantly shifting. While we have mapped the surface in detail, ...

No audio available for this content. As high-precision GNSS horizontal and vertical data becomes less expensive to collect, greater attention must be paid when reconciling vertical datasets. In 2013, ...