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volcano

Dave Schneider/Alaska Volcano Observatory & U.S. Geological Survey

 

To the untrained ear, volcanic thunder sounds like the rumble of a plane engine or a distant river. But scientists are really excited about the low hum, clicks and pops that were recorded during a March 2017 eruption at Bogoslof volcano.

Courtesy of AVO/Cindy Werner

The alert level for Bogoslof Volcano has been downgraded to “normal” after more than three months of inactivity.

The Alaska Volcano Observatory made the announcement Wednesday, although scientists say remote monitoring makes it difficult to determine if the eruption is really over.

While Bogoslof exploded more than 40 times in the last year, the AVO says all signs now point to another period of quiet.

Courtesy of Alain Beauparlant

After more than 40 years of quiet, the Great Sitkin Volcano has grown restless.

The Alaska Volcano Observatory (AVO) raised its alert level last week after Adak residents reported a steam plume rising 1,000 feet above the summit.

AVO Geophysicist Dave Schneider said the plume is just the latest sign of life at Great Sitkin, which has shown increasing seismic activity since the summer of 2016. That’s why the AVO upgraded its alert level from “normal” to “advisory.”

Paul Wade, NOAA Fisheries

 

Before Bogoslof volcano started erupting, it was a haven for endangered Steller sea lions, fur seals, and sea birds. But scientists did not know when and if animals would return to the eastern Aleutian Island.

Max Kaufman/Alaska Volcano Observatory/University of Alaska Fairbanks, Geophysical Institute

 

Scientists have had a hard time monitoring Bogoslof volcano since it started erupting in December. The island is so small, there is no equipment on the volcano, making it difficult to predict eruptions.

No one lives on Bogoslof – the closest human neighbors are 60 miles away in Unalaska. Scientists monitor from afar and they’ve had a lot to monitor lately. The volcano has erupted more than 40 times since December.

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