Mauna Kea is a dormant shield volcano on the island of Hawaiʻi. Its peak is 4,207.3 m above sea level, making it the highest point in Hawaii and the island with the second highest high point, behind New Guinea, the world's largest tropical island with multiple peaks that are higher. The peak is about 38 m higher than Mauna Loa, its more massive neighbor. Mau…Mauna Kea is a dormant shield volcano on the island of Hawaiʻi. Its peak is 4,207.3 m above sea level, making it the highest point in Hawaii and the island with the second highest high point, behind New Guinea, the world's largest tropical island with multiple peaks that are higher. The peak is about 38 m higher than Mauna Loa, its more massive neighbor. Mauna Kea is unusually topographically prominent for its height: its prominence from sea level is fifteenth in the world among mountains, at 4,207.3 m ; its prominence from under the ocean is 9,330 m, rivaled only by Mount Everest. This dry prominence is greater than Everest's height above sea level of 8,848.86 m, and some authorities have labeled Mauna Kea the tallest mountain in the world, from its underwater base. Mauna Kea is ranked 8th by topographic isolation.