This self-sustaining loop is known as the geomagnetic dynamo. Energy is needed to keep the dynamo running. This energy comes from the release of heat from the surface of the solid inner core.

A new study finds that unique ionospheric changes occurred in the upper atmosphere in response to the May 2024 geomagnetic ...

generated by a now-extinct molten core dynamo. This ancient field likely even connected with Earth's, according to NASA, creating a protective magnetosphere that shielded both bodies from solar wind ...

Mars used to have a geomagnetic field ... creating a self-sustaining dynamo, Schnepf explains. At least, that’s the textbook explanation – the truth is more nuanced, akin to “when you ...

G1? G3? G5? What do geomagnetic storm rankings really mean? Geomagnetic storms are capable of sparking beautiful displays of the Northern Lights across our night sky. However, there is a potential ...

A minor geomagnetic storm—a disturbance of Earth’s magnetic field—is expected Thursday, and is likely caused by high-speed winds from a spot on the sun’s surface, according to NOAA’s ...