How do we measure the temperature at the core of the earth?

Recent scientific studies lead experts to believe that Earth's inner core is approximately 10,800º F — or about the same temperature as the surface of the Sun! But how do scientists know how hot Earth's core is? They can't see it. They can't dig down deep enough to use a thermometer to measure its temperature. read more

If you want to measure the Earth's core temperature, then you have to be an expert at said field you encounter in the below answer. I assume you want to know how the temperature of the earth core is measured. Answer: Below the mantle, one can find Earth's core, which is made up of two parts. read more

As the outer core is fluid and presumably convecting (and with an additional correction for the presence of impurities in the outer core), we can extrapolate this range of temperatures to a temperature at the base of Earth's mantle (the top of the outer core) of roughly 3,500 to 5,500 kelvins (5,800 to 9,400 degrees F) at the base of the earth's mantle. read more

They can't see it. They can't dig down deep enough to use a thermometer to measure its temperature. read more