Learn about the largest active volcano on Earth Mauna Loa in Hawaii. Discover its massive size, eruption history, and fascinating facts about its role in shaping the Hawaiian Islands.

Mauna Loa and Mount St. Helens erupt in different ways,” said Liz Westby, a geologist based at the U.S. Geological Survey’s Cascades Volcano Observatory in Vancouver, Washington.

Mauna Loa is taller than Mount Everest Mauna Loa is one of 15 volcanoes located in the eight main Hawaiian islands. It makes up roughly 51% of the island of Hawaii, according to the U.S. National ...

Smoke rises from the crater of the Etna volcano as it erupts, on Mount Etna near Catania on June 2, 2025. Giuseppe Distefano/Getty Images. The National Institute of Geophysics and Volcanology said ...

Washington's Mount Rainier and Sicily's Mount Etna also made the list. Perhaps most interestingly, Mauna Loa has some competition for the crown of the largest volcano — that is, on the Earth's ...

Arsia Mons, the southernmost of the Tharsis Montes trio, stands at an awe-inspiring 20 kilometers high, dwarfing Earth's tallest volcano, Mauna Loa, which rises 9 kilometers above the seafloor.

Smoke rises from the crater of the Etna volcano as it erupts, on Mount Etna near Catania, Italy, on Monday. A huge plume of ash, gas and rock spewed forth from Europe's highest active volcano.

A volcano near Alaska's largest city is showing new signs of unrest, with experts saying the likelihood of an eruption at Mount Spurr in the next few weeks or months has increased. The Alaska ...

Satellites keep watching as the Mauna Loa volcano on Hawaii's Big Island continues spewing geysers of boiling lava and plumes of toxic volcanic ash over a week after it woke up from a nearly 40 ...

Mount Etna is the highest island mountain in the Mediterranean and the world's most active stratovolcano. More than 500,000 years ago, the volcano began to erupt, and at least 2,700 years of ...

Mount Adams in Washington state is seismically calm. But a flurry of earthquakes around the volcano has garnered attention from observers wondering whether it will blow.

Alaska’s Mount Spurr, a volcano about 80 miles away from the state's largest city, will "likely" erupt in the coming weeks or months for the first time in over 30 years, according to scientists.