A geomagnetic field. Lines of magnetic force, forged by currents in the planet's molten core, erupt from the surface close to the north ... ... <看更多>
Search
Search
A geomagnetic field. Lines of magnetic force, forged by currents in the planet's molten core, erupt from the surface close to the north ... ... <看更多>
Jun 22, 2016 - Geomagnetic reversal - Wikipedia, the free encyclopedia. ... the free encyclopedia Seafloor Spreading, Outer Core, Earth's Magnetic. ... <看更多>