Volcanoes and Valley of Yunaska Island, Alaska, USA52.6N 170.6W
Yunaska (right) is the largest of the Islands of Four Mountains group in the Aleutian Islands of southwestern Alaska, United States. It has a land area of 173.099 km² (66.834 sq mi). The island comprises two volcanic mountains, with a valley between.
The western mountain is composed of four overlapping and eroded stratovolcanoes, with a cinder cone field at the western end. It has not been historically active. The eastern mountain is a large shield volcano with two overlapping summit calderas, which last erupted in 1937.
Two other islands in the Four Mountains chain can also be seen: Amukta (far left) and Chagulak Island. These two volcanic islands are separated by a channel about 7 km wide, although they are actually joined underwater.
This image has been orthorectified. Please click here for more orthorectified images.