Massive waves of molten metal inside the Earth`s core cause the planet`s magnetic field to ...
(World News Science)

Jerks in the acceleration of the Earth`s protective magnetic field are triggered by rising blobs of molten material within the planet`s core, a new model suggests. Occurring around every 6 to 12 years, jerks have been identified by scientists as early back at 1901, but the exact nature of their origins had been a mystery. Researchers modelled the physical conditions within the Earth`s core using a supercomputer and found that rising blobs create powerful waves in the core. These waves change the flow of liquid that induces the planet`s magnetic field, triggering the jerks as a result. The revelation comes as scientists have been forced to publish an update on the planet`s magnetic north pole...