FAIRBANKS, Alaska—Okmok Volcano in the Aleutian Islands began erupting at 11:43 a.m. Saturday, just five hours after seismologists at the Alaska Volcano Observatory began detecting earthquakes. Okmok is located on Umnak Island near Unalaska in the Aleutian Islands.

The initial ash cloud reached heights of approximately 45,000 feet. As of Monday afternoon, an ash cloud was drifting southeast of the 3,520 foot volcano at heights of 30,000 feet and posed a risk to aircraft. Two plane flights from Unalaska were cancelled due to the eruption.

Students learn from largest eruption in North Pacific

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South-central Alaska's Mount Wrangell rumbled for 11 minutes following the Sumatra earthquake in December 2004. A swarm of 14 earthquakes were triggered at Mount Wrangell about one hour after the initial rupture in Indonesia, more than 6,800 miles away.

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FAIRBANKS, Alaska—When an Alaska volcano erupts, it doesn’t just affect the immediate surroundings; volcanic ash may swirl through the atmosphere and travel throughout the North Pacific region. The ash can impact residents’ health and divert air traffic flying in and around the state. To date, scientists can’t predict volcanic eruptions, but they can forecast how volcanic ash will behave once it’s in the atmosphere.

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Although it's been more than a year since Mount Augustine had its memorable eruption, work continues for University of Alaska Fairbanks researchers. The work of Alaska Volcano Observatory employees from UAF's Geophysical Institute will be appearing in the upcoming issue of the journal Science.

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Volcanoes give us important information about their behavior from their temperature. However, getting close enough to take a volcano’s temperature is often a dangerous undertaking. In the past, measurements required the volcanologist to get uncomfortably close to the activity. Recent advances in digital infrared imaging allow volcanologists to measure temperatures from a safe distance and over large areas with infrared cameras.

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Volcanoes give us important information about their behavior from their temperature. However, getting close enough to take a volcano’s temperature is often a dangerous undertaking. In the past, measurements required the volcanologist to get uncomfortably close to the activity. Recent advances in digital infrared imaging allow volcanologists to measure temperatures from a safe distance and over large areas with infrared cameras.

For travelers in Europe, the recent eruption of Iceland’s Eyjafjallajokull [AY-uh-fyat-luh-YOE-kuutl-uh] meant a major disruption in business and travel plans. For Alaska volcano researchers, the eruption has offered a chance to learn more about the way volcanoes work.