Discovery of a new type of magnetic wave in the Earth’s core

Discovery of a new type of magnetic wave in the Earth’s core

Scientists have detected a brand new type of magnetic wave that travels through Earthfrom the outer core every seven years, thereby distorting the strength of our planet’s magnetic field.

The waves – nicknamed “magneto-coriolis” waves because they travel along the Earth’s axis of rotation, according to the Coriolis effect – creep from east to west in tall columns that can travel up to 930 miles (1,500 kilometers) per year, the researchers wrote in a March 21 article in the journal Proceedings of the National Academy of Sciences. Using a fleet of European Space Agency (ESA) satellites, the team identified the mysterious waves all the way to the outermost layer of Earth’s liquid outer core, just where this layer meets the rocky mantle – about 1,800 miles (2,900 km) below the planet’s surface.

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