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Alaska Volcano Observatory
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The questions below are ones that we frequently receive from people interested in Alaska's volcanoes. Since some of these questions are answered by information in this website (and other websites), we've provided links for you to follow to learn of the answer(s).

How many active volcanoes are there in Alaska?

Where can I find a list of latitudes and longitudes for volcanoes in Alaska?

How can I volunteer at / intern at / study at / work for AVO?

Why are there volcanoes in Alaska?
Most volcanic activity in Alaska is the result of subduction, the process in which one crustal plate slides beneath another. In the Aleutian Arc, the northward-moving Pacific Plate dives beneath the North American Plate at a rate of 6 to 7.5 centimeters (2.5 to 3 inches) per year (see Plate Tectonics). As the Pacific Plate slowly grinds beneath the Alaska portion of the North American Plate, stress and strain are stored and then released in great earthquakes. In fact, about one-quarter of all earthquake energy released on earth is released in Alaska, and three of the ten largest earthquakes since 1900 took place in Alaska. During this century alone, Alaska has had nearly 70 earthquakes of magnitude 7 or greater. These large earthquakes and thousands of smaller ones occur at the boundary of the Pacific and North American plates. They form a narrow curtain of activity which deepens northward from the Aleutian trench and is about 100 kilometers (60 miles) deep underneath the Aleutian Arc volcanoes. From Nye, C. J., Queen, Katherine, and McCarthy, A. M., 1998, Volcanoes of Alaska: Alaska Division of Geological & Geophysical Surveys Information Circular IC 0038, unpaged, 1 sheet, scale 1:4,000,000

How do Alaskan volcanoes form?

If nobody lives up there, what hazards are there from eruptions at Alaskan volcanoes?

How do you monitor volcanoes?

How often do volcanoes in Alaska erupt?

Can I use the images from the AVO website?

Where do I find high-resolution images of Alaska's volcanoes?

Do you have any images of Alaska volcanoes erupting?

Does AVO work on other volcanoes?

Why do you work with Russian volcanologists?

Where can I find more information about a specific eruption?

Can you send me a sample of volcanic ash or rock?


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URL: www.avo.alaska.edu/faq.php
Page modified: December 2, 2016 10:12
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