How do we know the outer layer of the core is molten

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asked Dec 11, 2017 94.7k views

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Larsmoa · Answer 1 · 2017-12-16T23:26:13+0000

But it may surprise you to learn that, in between the solid inner core and the solid mantle, lies a liquid layer more than 2,000 kilometers thick: the Earth's outer core... The way we know that the outer core is liquid is quite brilliant: from the seismic waves produced from earthquakes.

How do we know the outer layer of the core is molten

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