The Deep Earth (IMAGE) Carnegie Institution for Science Caption As depth increases in the planet, so does the temperature and pressure. In this diagram the crust and upper mantle is grey, the lower mantle is yellow, the outer is core orange, and the inner core is bright orange. The pressure between the upper and lower mantle is about 23 gigapascals or about 230,000 times atmospheric pressure at sea level. At the base of the lower mantle the pressure increases to an intense 1.35 million times sea-level pressure (135 GPa). Credit Image courtesy Russell Hemley. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.