* By area: Mauna Loa in Hawaii is the largest volcano on Earth by area, covering roughly 2,035 square miles (5,271 square kilometers).
* By volume: Tamu Massif in the northwest Pacific Ocean is the largest volcano on Earth by volume, with an estimated volume of 1.8 million cubic miles (7.5 million cubic kilometers).
However, Tamu Massif is an extinct underwater volcano that has eroded significantly over time. It is not as impressive or active as Mauna Loa, which is still a very active volcano.
So, depending on the definition of "biggest", either Mauna Loa or Tamu Massif would be the correct answer.
