Deep beneath the ocean floor, ancient sediments hint that Earth’s magnetic field sometimes changed far more slowly than expected.

The blobs lie at the base of Earth’s mantle, around 1,802 miles beneath Africa and the Pacific.

The South Atlantic Anomaly, a weak spot in Earth's magnetic field, has expanded by nearly half the size of continental Europe ...

The continent-sized blobs are much hotter than the lower mantle, creating a significant temperature gradient in the rocky ...

Earth’s magnetic field is easy to forget. It doesn’t make noise, it doesn’t flash, and it doesn’t ask for attention. Yet it ...

Add Yahoo as a preferred source to see more of our stories on Google. Over 11 years of satellite data reveal that Earth’s magnetic field is reshaping. (CREDIT: Shutterstock) More than a decade of ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: It used to be thought that there were more volatiles ...

New satellite-based analysis explains how energy carried by Alfvén waves moves from Earth’s magnetosphere into the atmosphere to generate auroral light emissions.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Here’s what you’ll learn when you read this story: The Earth’s magnetosphere protects life from deadly ...

A growing weak spot in the magnetic field surrounding the Earth could lead to satellite malfunction and even cause them to undergo full blackouts, scientists warned in a new study. It is generated by ...

A new analysis of computer simulations of Earth’s magnetic field suggests that its behavior was different early in Earth’s history, resulting in greater stability and fewer reversals of the magnetic ...

Geophysicists from ETH Zurich and SUSTech, China, have demonstrated the dynamo effect of the Earth’s core in a model in which viscosity has no influence, as is the correct physical regime for the ...