volcano

Matt Loewen / Alaska Volcano Observatory

A magnitude 3.5 earthquake occurred at Great Sitkin Volcano on Friday.

Since then, seismic activity has returned to lower levels, and no eruptive activity has been detected at the volcano – located 26 miles east of the community of Adak.

Hans Schwaiger, a scientist with the Alaska Volcano Observatory (AVO), said it appears the shallow earthquake was an isolated event, although small local earthquakes have continued over the past day.

National Oceanic and Atmospheric Administration

After two months of activity, Pavlof Volcano has been downgraded to a "normal" alert level.

The Alaska Volcano Observatory (AVO) issued an "advisory" for the volcano — which is located about 35 miles from Cold Bay — in December. But over the past several weeks, seismic activity steadily decreased.

The last observable sign was what the AVO calls "minor steam emissions," which occurred in late February. Since then, there have been no signs of activity at the volcano. 

United States Geological Survey

A magnitude-6.2 earthquake struck Wednesday night about 50 miles from Adak.

"To give you an idea of how large that is, you get only about 100 magnitude-6 earthquakes on the globe annually," said seismologist Ken MacPherson of the Alaska Earthquake Center. "So that's a fairly significant earthquake."

Adak residents felt the shallow earthquake, which followed a series of smaller quakes in the same area.

MacPherson also said there have been dozens of aftershocks.

Candace Shaack

After showing signs of restlessness, Pavlof Volcano is back at a normal alert level.

The Alaska Volcano Observatory issued an "advisory" for Pavlof last month, following small explosions at its summit 36 miles northeast of Cold Bay. Since then, there have been no further signs of unrest, and scientists downgraded the volcano to "normal" last week.

Kamchatkan Volcanic Eruption Response Team

Volcanic eruptions on Russia's Kamchatka Peninsula have delayed and canceled flights in the Aleutian Islands over the last several days.

Bezymianny Volcano exploded Friday, throwing ash 50,000 feet into the air — some 1,300 miles from Unalaska.

Meanwhile, Sheveluch Volcano has remained restless since an eruption last month, with a growing lava dome and continued ash emissions.

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