Mauna Loa volcano on the island of Hawai'i is the largest volcano on Earth. With an elevation of 4,170 m above sea level, its long submarine flanks descend to the sea floor an additional 5 km, and the sea floor in turn is depressed by Mauna Loa's great mass another 8 km. This makes the volcano's summit about 17 km (56,000 ft) above its base. The volcano is constructed of an estimated 80,000 km3 of basalt. Of the 1,511 volcanoes known to have erupted in the past 10,000 years, 164 are shield volcanoes.
Lava tubes are essential for building broad shield volcanoes, because they permit lava to travel great distances from an erupting vent. For example, geologists estimate that as much as 58 percent of Kilauea volcano is covered with lava fed from lava tubes.
Shield volcanoes generate some of Earth's largest landslides. A landslide from East Moloka'i Volcano on Moloka'i Island had a volume of about 500 km3 and slid at least 120 km across the ocean floor.
One of the largest known volcanoes in our solar system, Olympus Mons on Mars, is a shield volcano.
Related categories GEOGRAPHY
• GEOLOGY AND PLANETARY SCIENCE
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