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.

Earth’s magnetic field. The north and south magnetic poles mirror the geographic North and South poles. PeterHermesFurian/iStock via Getty Images Plus The Earth’s magnetosphere, a protective ...

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 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 ...

Geologic records reveal that magnetic field strength and oxygen levels rise and fall together, implying deep-Earth processes ...

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 ...

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 ...