Mauna Loa is the largest volcano on Earth by volume and area covered. It is a shield volcano located on the Big Island of Hawaii, formed by frequent eruptions of low-viscosity basaltic lava. Its gradual slopes are a result of the fluid lava flows spreading over large distances.
Mauna Kea is a dormant volcano on the Big Island of Hawaii. Although slightly shorter in elevation compared to Mauna Loa, Mauna Kea is taller when measured from its base on the ocean floor. It is characterized by its gentle slopes and is known for its astronomical observatories due to its clear skies.
Ojos del Salado is the highest volcano in the world, standing at approximately 6,893 meters (22,615 feet) above sea level. It is part of the Andes mountain range and is characterized by its high altitude and glaciated peak. Ojos del Salado is a stratovolcano with a complex geological history.
Mt. Etna is one of the most active volcanoes in the world and the tallest active volcano in Europe. It is located on the east coast of Sicily and has a complex geological structure due to its frequent eruptions of basaltic lava flows and pyroclastic material.