Users' questions

How deep is it to the center of the Earth?

How deep is it to the center of the Earth?

The distance to the center of the Earth is 6,371 kilometers (3,958 mi), the crust is 35 kilometers (21 mi) thick, the mantle is 2855km (1774 mi) thick — and get this: the deepest we have ever drilled is the Kola Superdeep Borehole, which is just 12km deep.

How far down is the Earth’s core in feet?

The center of the earth lies 6,400 kilometers (4,000 miles) beneath our feet, but the deepest that it has ever been possible to drill to make direct measurements of temperature (or other physical quantities) is just about 10 kilometers (six miles).

Why is the earths core round?

Earth’s lopsided core growth Far beneath our feet, Earth’s inner core is solid iron, very hot and very dense. The relentless pull of Earth’s gravity squeezes what would otherwise be a lopsided Earth core back into the shape of a round ball.

Can an underground city exist?

It is virtually impossible for any city to exist without buried power and information networks; underground water transmission, sewerage pipes, malls, basements, pedestrian tunnels, and motorways; sometimes a subway system, etc.

What is the distance from the surface of the Earth to the core?

The outer core of the Earth begins at a depth of 1790 miles (2881 km) and extends to 3160 miles (5086 km) to its boundary with the inner core.The solid inner core extends from 3160 miles (5150 km) to 3977 miles (6400 km) below the surface.The center point of the Earth lies at an average depth of 3977 miles (6400 km) from the surface. Home

What is the temperature of the Earth’s inner core?

It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70% of the Moon’s radius. It is composed of an iron–nickel alloy and some other elements. The temperature at the inner core’s surface is approximately 5,700 K (5,430 °C) or 9806 °F, which is about the temperature at the surface of the Sun.

What makes up the core of the Earth?

At approximately 5,400°C, this inner core is similar in temperature to the surface of the Sun. The remainder is the Earth’s liquid outer core, made of mostly nickel-iron, with similar temperatures, getting hotter towards the centre. But how can we possibly know such detail about a location that is so inaccessible?

How is the inner core different from the outer core?

The temperature of the inner core is far above the melting point of iron. However, unlike the outer core, the inner core is not liquid or even molten. The inner core’s intense pressure—the entire rest of the planet and its atmosphere—prevents the iron from melting.

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