Discovery could help our understanding of how and when the magnetic field was turned on.
Earth's magnetic field protects and makes our planet habitable by stopping harmful high-energy particles from space, including from the Sun. The source of this magnetic field is the core at the centre of our planet.
Yet we are part of a research team that found a way to get information about Earth's core, with details published recently inThe core is the hottest part of our planet with the outer core reaching temperatures of more than 5,000 degrees Celsius. This has to affect the overlying mantle and it is estimated that 50 percent of volcanic heat comes from the core.Volcanic activity is the planet's main cooling mechanism.
Our findings suggest some core material does transfer into the base of these mantle plumes, and the core has been leaking this material for the past 2.5 billion years.
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