Somewhere south of India, the ocean surface dips by roughly 100 meters below the expected shape of the Earth, a gravitational ...

Have you ever thought to use a clock to identify mineral deposits or concealed water resources within the Earth? Some scientists are convinced that ultraprecise portable atomic clocks will make this a ...

Bottom line: There's a well-known "hole" in Earth's gravity field just off India's coastline, known as the Indian Ocean Geoid Low (IOGL). A new study is providing a potential explanation for this ...

[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 ...

Earth’s lowest “gravity hole,” a mysterious depression in the Indian Ocean that experiences less gravity than the rest of the planet, is likely due to plumes of magma under the Earth’s crust, a recent ...

A frozen continent at the bottom of the world sits over the deepest dip in Earth’s gravitational pull, a feature that has persisted for roughly 70 million years. Scientists have long known about this ...

For years, researchers have tried to pinpoint how an area deep in the Indian Ocean with lower gravitational pull came to be. A team in India may have figured it out. The area in question is called the ...

When we’re told about newly released satellite images of our Earth, we imagine beautiful swathes of green and blue with the occasional white of swirling storm clouds or snow-topped mountain ranges.

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 ...