alaska volcano observatory

John Lyons / USGS

In a new study, scientists say a group of volcanic Aleutian islands could be part of a massive, single, undiscovered volcano.

While scientists have been compiling their research for six years, there's still a lot to piece together, according to Diana Roman, a volcanologist with the Carnegie Institution for Science in Washington, DC.

Alaska Earthquake Center

A magnitude-6.4 earthquake hit about 25 miles east of Nikolski Tuesday morning, and was felt by residents in Nikolski, Unalaska, and Akutan. The earthquake hit just before 7:30 a.m.

It was a "reasonable size tectonic earthquake," according to Dave Schneider, a geophysicist with the Alaska Volcano Observatory. He said Aleutian Island residents can expect to feel some aftershocks.

"This is a pretty typical tectonic earthquake for the region," he said. "It's on a very seismically active part of the Aleutian arc, and there's nothing that jumps out as being unusual."

Hope McKenney/KUCB

 

On Monday, in the middle of testing the city’s sirens, Unalaska received notification of a large earthquake southeast of Sand Point and a subsequent tsunami warning in communities east of Unalaska to the Kenai Peninsula

Courtesy of David Fee / AVO/UAF-GI

 

Scientists have raised Pavlof Volcano's alert level, after the volcano began showing signs of restlessness. 

The Alaska Volcano Observatory issued an "advisory" for Pavlof on Monday following an ongoing tremor at the volcano, located 36 miles northeast of Cold Bay.

Courtesy Malcolm Herstand / Alaska Volcano Observatory

Scientists have downgraded the alert level at Makushin Volcano after a sustained pause in unrest. 

John Power, a geophysicist with the Alaska Volcano Observatory, said the seismicity has been steadily declining for months, following an earthquake sequence near the volcano that began in mid-June. 

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