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Volcanoes and Valley of Yunaska Island, Alaska, USA

52.6N 170.6W

September 9th, 2009 Category: Volcanoes

Alaska, USA - July 15th, 2009

Alaska, USA - July 15th, 2009

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 kmĀ² (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.

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