which island of the hawaiian island chain is the youngest
Hawaiian Islands Hawaiʻi island (the Big Island) is the biggest and youngest island in the chain, built from five volcanoes. Mauna Loa, taking up over half of the Big Island, is the largest shield volcano on the Earth. The measurement from sea level to summit is more than 2.5 miles (4 km), from sea level to sea floor about 3.1 miles (5 km).[21]
Hawaii (island) The island is often referred to as the Island of Hawaiʻi,[4] the Big Island, the Big I, or Hawaiʻi Island to distinguish it from the state. Administratively, the whole island encompasses Hawaiʻi County.