Is the Earth's core solid, liquid, or gas? - Quora

Answer (1 of 7): The outer core (between ~1220 km to ~3400 km from the Earth’s center) is theorized to be liquid, while the inner core (less than 1220 km from the center) is solid. This is based on seismic data, where the inner ore has been observed to reflect seismic waves.

How is the thickness of the Earth's outer core measured? - Quora

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What is the major difference between the inner core and the outer core? - Quora

Schematic diagram of a typical Gas Insulated Substation

Is the Earth's core solid, liquid, or something else? - Quora

What is the Earth's core? - Quora

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Is the Earth's core solid? - Quora