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Science & Environment

Science and environmental reporting on news and community topics. Science coverage is occasionally provided by community members.

Vic Fisher

Bogoslof Volcano erupted again Wednesday, spewing a cloud of ash that was visible from Unalaska.

The volcano blew around 1:20 p.m., sending ash at least 31,000 feet into the air and prompting the Alaska Volcano Observatory to raise its alert level to red.

That’s the highest status, indicating a hazardous eruption is underway or imminent.

Chris Waythomas, AVO-USGS

 

New photos show the dramatic effect of volcanic explosions on Bogoslof Island. The Eastern Aleutian island is home to a volcano that has been erupting since mid-December. Now, the tiny island is even smaller and it’s shaped like a hook.

Chris Waythomas, of the U.S. Geological Survey, says the photos also show ash on the island.

“There’s ash draping over everything,” said Waythomas. “There’s a layer of fine muddy-looking ash covering what was a partially vegetated island.”

Dave Schneider, AVO/USGS

 

Two hours after lowering the aviation code for an Eastern Aleutian volcano, it’s back at the highest alert level.

The reasoning? According to the Alaska Volcano Observatory, there was a significant explosion at Bogoslof volcano Thursday afternoon.

 

Courtesy Lynda Lybeck-Robinson

Unrest continues at Bogoslof volcano, but scientists say they’ve fine-tuned monitoring the activity from afar. The Eastern Aleutian volcano had a short lived, but powerful eruption Tuesday night.

David Schneider is a geophysicist with the U.S. Geological Survey.  He says this eruption isn’t much different from the others dating back to mid-December.

“It just indicates that the volcano continues to be in a heightened state of unrest," Schneider said. "It’s pretty unpredictable at this point.”

The five-minute explosion threw ash more than 30,000 ft into the air.

T. Keith, U.S. Geological Survey

Scientists believe Bogoslof volcano erupted for the first time this year, following a series of explosions that date back to mid-December. 

Monitors on nearby islands detected seismic activity Monday emanating from the Eastern Aleutian volcano.

But scientists believe the explosion was minor. The period of increased seismicity lasted about 10 minutes.

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