The temperature of the inner core of the Earth is estimated to be between 4,000 and 5,000 degrees Celsius (7,200 to 9,000 degrees Fahrenheit).
This extremely high temperature is primarily due to the intense pressure from the layers of the Earth above it, which causes the inner core to be solid despite the high temperatures. The inner core is composed mainly of iron and nickel, and as a result of both heat and pressure, these metals remain in a solid state. The heat is generated from several sources, including the residual heat from the planet’s formation, radioactive decay of isotopes, and the pressure from surrounding rocks. Understanding the temperature of the inner core is crucial for geologists as it helps in studying the Earth’s formation and behavior over geological time scales.