Olympus Mons is on the second-smallest planet in the consortium.
The typical atmospheric pressure at the top of Olympus Mons is 72 pascals, about 12% of the average Martian surface pressure of 600 pascals
 A study in 2016 found that Tamu Massif likely encompassed the entire Shatsky Rise, meaning that Tamu Massif has an area of about 533,000 square kilometres (206,000 sq mi), surpassing Olympus Mons in surface area, though it has not yet been determined which of the two volcanoes has a greater mass

