Did you know that Hawaii’s Mauna Kea or White Mountain is the world’s tallest peak, measuring 16,400 m (47,000 feet) from base to summit? And that underwater volcanoes account for 75% of annual magma output? Just like Mauna Kea’s height, with 10,000 m (33,500 feet) under sea level, underwater volcanoes and their eruptions often go unnoticed. And because the usual signs like rumbling and smoke are harder to detect, it is all the more spectacular when an underwater volcano visibly erupts. Follow us around the globe for some of the most stunning sights.
It is estimated that there are currently 5,000 active underwater volcanoes worldwide; of various sizes, standing alone or forming ridges with other volcanoes, of which the highest ones will rise above the surface as islands. The submerged part of the Hawaiian Islands, for example, is one of the largest and longest volcanic ridges – more than 2,400 km (1,500 miles) long.