Mount Kupreanof
Encyclopedia
Mount Kupreanof is a stratovolcano
on the Alaska Peninsula
, United States
. It is the largest and the northeasternmost in a group of five volcanoes opposite from Stepovak Bay
. Mount Kupreanof displays extremely strong fumarole
activity and its latest eruption in 1987 produced minor steam and ash emission. This is the only known historical eruption from Mount Kupreanof.
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...
on the Alaska Peninsula
Alaska Peninsula
The Alaska Peninsula is a peninsula extending about to the southwest from the mainland of Alaska and ending in the Aleutian Islands. The peninsula separates the Pacific Ocean from Bristol Bay, an arm of the Bering Sea....
, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It is the largest and the northeasternmost in a group of five volcanoes opposite from Stepovak Bay
Stepovak Bay
Stepovak Bay is a bay located on the Alaska Peninsula, Alaska, on the Gulf of Alaska. It is framed by the Stepovak Bay group of volcanoes, a chain of 5 cinder cone volcanoes in the Aleutian Arc. The volcanoes include Kupreanof and four numbered volcanoes .It was named Stepovakho Bay or Stepof's Bay...
. Mount Kupreanof displays extremely strong fumarole
Fumarole
A fumarole is an opening in a planet's crust, often in the neighborhood of volcanoes, which emits steam and gases such as carbon dioxide, sulfur dioxide, hydrochloric acid, and hydrogen sulfide. The steam is created when superheated water turns to steam as its pressure drops when it emerges from...
activity and its latest eruption in 1987 produced minor steam and ash emission. This is the only known historical eruption from Mount Kupreanof.