Mariana Islands
20.02 N, 145.22 E
summit elevation 227 m
Caldera
Maug Islands are three small elongated islands up to 2.3 km long in the northern Mariana Islands. They mark the northern, western, and eastern rims of a largely submerged 2.5 km wide caldera. The caldera has an average depth of about 200 m and contains a twin-peaked central lava dome that rises to within about 20 m of the surface.
Further reading
Embley, R. W., et al. "Explorations of Mariana arc volcanoes reveal new hydrothermal systems." Eos, Transactions American Geophysical Union 85.4 (2004): 37-40.
No recent eruptions