Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth's surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the field by means of dynamo theories, whereby a source of energy in the Earth's core causes a self-sustaining magnetic field. In the dynamo theories, fluid motion in the Earth's core involves the movement of conducting material within an existing magnetic field, thus creating a current and a self-enforcing field.
Learn more about geomagnetic field with a free trial on Britannica.com.
Triaxial Geomagnetic IC targets smartphones and tablet PCs.(Yamaha Enhances Its Geomagnetic Sensor Lineup with YAS530 Triaxial Geomagnetic IC Chip)
Mar 15, 2011; Housed in 2.0 x 2.0 x 0.8 mm package with I2C host interface, Model YAS530 features wide dynamic range of [+ or -]800 [micro]T...