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Alaska Volcano Erupts Unexpectedly — Twice

Image: Alaska Volcano Erupts Unexpectedly — Twice

The Alaskan volcano on Bogoslof Island erupted twice this week. (U.S. Geological Survey)

By    |   Thursday, 22 Dec 2016 03:41 PM

A volcano on the Aleutian Islands of Alaska erupted unexpectedly Tuesday and again about 24 hours later, sending plumes of ash more than 30,000 feet into the air and prompting aviation alerts that were later downgraded.

The two eruptions were explosive, but only lasted a short time before diminishing.

The Bogoslof volcano, located in the Bering Sea about 850 miles southwest of Anchorage, had not had recent volcanic activity prior to erupting, The Seattle Times reported.

According to Wired, the eruptions had lots of volcanic lightning, which is often seen in vulcanian eruptions that spew out mostly old material. These eruptions are sometimes isolated events but can also be the precursor to longer periods of activity.

The volcano has been put on Orange or Watch status by the Alaska Volcano Observatory with no activity observed since early Wednesday.

The Bogoslof volcano is on a small island but rises up almost 5,000 feet from the sea floor, although only about 1,000 feet is above the ocean waters. It last erupted in 1992 and created a new dome. It has erupted several times since it was discovered in 1796 from different vents on the island, Wired said.

Real-time monitoring doesn’t exist for Bogoslof, but the area does get a lot of air traffic because of flights from North America to Asia. The Volcano Ash Advisory Centers lets air traffic controllers and airlines know about eruptions so they can change their routes to avoid any potential problems with volcanic ash or eruptions, according to Wired.

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A volcano on the Aleutian Islands of Alaska erupted unexpectedly Tuesday and again about 24 hours later, sending plumes of ash more than 30,000 feet into the air and prompting aviation alerts that were later downgraded.
alaska, volcano, erupts, unexpectedly, twice
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2016-41-22
Thursday, 22 Dec 2016 03:41 PM
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