Is core of earth increasing in size?

The researchers found that the uncorrected temperature data correlated strongly with data on movements of Earth's core and Earth's length of day until about 1930. read more

At the center of the Earth lies a two-part core. The inner part is roughly the size of the moon, and has the density of steel. The outer core surrounding it is an ocean of liquid metal some 2,300 kilometers thick. The Earth's rotation makes this ocean flow and swirl, and the moving metal generates the planet's magnetic field. read more

Earth's mass has remained constant, and thus the gravitational pull at the surface has decreased over time. Earth's mass has grown with the volume in such a way that the surface gravity has remained constant. Earth's gravity at its surface has increased over time, in line with its hypothesized growing mass and volume. read more

Earth's core is about 4,400 miles (7,100 km) wide, slightly larger than half the Earth's diameter and roughly the size of Mars. The outermost 1,400 miles (2,250 km) of the core are liquid, while the inner core — about four-fifths as big as Earth's moon at some 1,600 miles (2,600 km) in diameter — is solid. read more