alaska volcano observatory

A group of scientists from Colorado is using drone technology to keep an eye on activity in Makushin Volcano.

Mount Shishaldin is simmering down after a Friday eruption sent an ash cloud across the eastern Aleutians, prompting the Alaska Volcano Observatory to raise the aviation color code to red.

Two ash eruptions from Shishaldin Volcano disrupted air travel to the Aleutians Tuesday.

Shishaldin volcano, which has been erupting for days, sent an ash cloud 40,000 feet into the air above Unimak Island early Friday morning.

A volcano on Unimak Island in the Eastern Aleutians is on watch for an eruption — Shishaldin is spewing lava at its summit, but the real threat is if it starts to emit ash.

Earthquake activity has decreased at two western Aleutian volcanoes, reducing the potential for an eruption.Thursday, the Alaska Volcano Observatory lowered the alert levels for remote Tanaga and Takawangha Volcanoes, about 60 miles west of Adak.

Two western Aleutian volcanoes are showing signs of unrest, signaling the potential for an eruption in the coming days or weeks.

The ice-filled caldera of Takawangha, which rises 4,753 feet out of the Bering Sea, is in the far western Aleutians, about 55 miles west of Adak. The volcano has been showing signs of unrest since Nov. 18.

The three Aleutian volcanoes that have been erupting simultaneously in recent months could be joined by a fourth. Davidof Volcano in the Western Aleutians has remained inactive for thousands of years. But a series of earthquakes measured around the dormant volcano has some researchers wondering if Davidof is waking up.

Three volcanoes continue to erupt across the Aleutian Chain. But that’s not out of the ordinary, says an Alaska geologist.