Earth's magnetic field originates in the outer core and extends out into the magnetosphere — a region of space that helps protect Earth from space weather.

A rare geological event occurs every 300,000 years or so: the Earth’s magnetic poles flip. The magnetic poles are the two ends of the magnetosphere, which surrounds the Earth like a giant, invisible ...

The dayside magnetosphere, the side of the magnetic field directly between the Earth and the sun, is a vast place. It usually extends some 10 times the radius of the Earth toward the sun, ...

The strength of our magnetosphere makes it unique among the rocky planets. While Mars lost its magnetic field sometime in the distance past, Mercury possesses a measly imitation. According to NASA ...

A new model describes Neptune's "badly behaved" magnetic field, showing how its tilt and interactions with the solar wind lead to a lopsided magnetosphere. The model could lend insight into ...

The magnetosphere—the magnetic field that surrounds our planet like a protective shield—had degraded to its lowest intensity ever, according to a study published January 28 in Nature Geoscience.

Earth’s magnetic field was once 30 times weaker than it is today. This change may have played a pivotal role in the blossoming of complex life, new research found.

Thousands of years ago, Earth’s magnetic field underwent a significant power surge over a part of the planet that included the ancient kingdom of Mesopotamia. People at the time probably never ...

Researchers have spotted interesting changes in the South Atlantic Anomaly, which is a region of Earth’s magnetic field that has a large dent. The area of weak magnetism appears to be splitting ...

The oldest firm age yet for Earth's magnetic field suggests that it developed before a solid planetary core, 3.7 billion years ago. When you purchase through links on our site, we may earn an ...