Volcano Islands Volcano Islands The or are a group of three Japanese islands south of the Bonin Islands that belong to the municipality of Ogasawara, Tokyo Metropolis, Japan. The islands are all active volcanoes lying atop an island arc that stretches south to the Marianas. They have an area of , and a population of 380. The Volcano Islands are: Farther north but in the same volcanic arc is: There is a Japan Self-Defense Forces air base on Iwo Jima with a staff of 380. It is located in the village of Minami (Iwo Jima village). Other than that, the islands are
Masaya Volcano Masaya Volcano Masaya is a caldera located in Masaya, Nicaragua, 20 km south of the capital Managua. It is Nicaragua's first and largest national park, and one of 78 protected areas of Nicaragua. The complex volcano is composed of a nested set of calderas and craters, the largest of which is Las Sierras shield volcano and caldera. Within this caldera lies a sub-vent, which is Masaya Volcano "sensu stricto". The vent is a shield type composing of basaltic lavas and tephras and includes a summit crater. This hosts Masaya caldera, formed 2,500 years ago by an 8-km³ basaltic ignimbrite eruption.