Wikipedia:Today's featured list/October 21, 2022
There are more than 80 identified volcanoes in the Hawaiian–Emperor seamount chain, a series of volcanoes and seamounts extending about 6,200 kilometres (3,900 mi) across the Pacific Ocean. The chain has been produced by the movement of the oceanic crust over the Hawaiʻi hotspot, an upwelling of hot rock from the Earth's mantle. As the oceanic crust moves the volcanoes farther away from their source of magma, their eruptions become less frequent and less powerful until they eventually cease to erupt altogether. The chain can be divided into three subsections. The first, the Hawaiian archipelago, consists of the islands comprising the U.S. state of Hawaii. The second part of the chain is composed of the Northwestern Hawaiian Islands. The oldest and most heavily eroded part of the chain are the Emperor seamounts, which are 39 to 85 million years old. (Full list...)