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Alaska: increased alert level for Cleveland volcan

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By Anda Robescu | 2016-10-25 12:16:01

Scientists have raised Monday the alert level for a volcano located in the Aleutian Island, Alaska, after an explosion was detected on the mountain and was heard by residents of Nikolski, a small town located 72 kilometers away, informs Reuters.

Cleveland volcano alert level for its peak of 1,730 meters on Chuginadak Island, about 1504 kilometers southwest of Anchorage, was raised to orange from yellow by the Volcanic Observatory in Alaska. The volcano, named after one of the US presidents, Grover Cleveland, is among the most active volcanoes in Alaska, and the ashes expelled when the eruption could pose a threat to air traffic. Earlier this year Mount Pavlof on the Alaska Peninsula erupted with little advanced warning, spewing an ash cloud up to 20,000 feet (6,096 meters) high that prompted aviation warnings across the region.


The orange code, the second-highest on the scale, is issued when a volcano is “exhibiting heightened or escalating unrest with increased potential of eruption,” according to the observatory. A red code is issued when an eruption is imminent or under way. The observatory said that an explosion was detected on Cleveland by both infrasound and seismic data and heard by residents of Nikolski, a settlement of less than 50 people on Umnak Island about 45 miles (72 km) to the east.


Scientists said that cloudy weather obscured Cleveland’s peak in satellite images but that no evidence of an eruption cloud had been detected at a height of 28,000 feet (8,534.4 meters). Pavlof is currently at yellow on the alert scale, meaning that it is “exhibiting signs of elevated unrest” but not erupting, according to the observatory.

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