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Mount Spurr Mount Spurr is a volcano in the Aleutian Volcanic Arc of Alaska. The current volcano sits on top of the remains of an old volcano that was destroyed in a giant debris avalanche about 10,000 years ago. Spurr has erupted twice in historic times: in 1953 and again in 1992. Both eruptions lead to falls of volcanic ash in the city of Anchorage, Alaska 130 km (81 miles) to the east. As with other Alaskan volcanoes, the proximity of Spurr to major trans-Pacific aviation routes means that an eruption of this volcano can significantly disrupt air travel. Volcanic ash can melt inside jet engines, causing them to fail. On July 26, 2004, the Alaska Volcano Observatoryhttp://www.avo.alaska.edu/(AVO) raised the "Color Concern Code" at Spurr from green to yellow due to an increasing number of earthquakes. Earthquakes beneath a volcano may indicate the movement of magma preceding a volcanic eruption, but the earthquakes might also die out without an eruption. In the first week of August 2004, the AVO reported the presence of a collapse pit, filled with water forming a new lake, in the ice and snow cover on the summit. This pit may have been cause by an increase in heat flow through the summit lava dome. No eruption is likely. External link Spurr, Mount Spurr, Mount Spurr, Mount Spurr, Mount
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