As a geophysicist with a focus on the study of Earth's internal structure, I can confirm that the inner core of the Earth is indeed solid. The core of the Earth is composed primarily of iron, with a distinct outer core that is liquid and an inner solid layer. The outer core is crucial for the generation of the geodynamo, which is the mechanism that creates Earth's magnetic field due to the motion of the conducting liquid iron. read more >>

Earth's inner core is solid: Official. The core of the Earth is made up mainly of iron, in an outer liquid layer and an inner solid layer. The outer core is where the circulating conducting liquid generates the geodynamo, responsible for our magnetic field.read more >>