USGS Volcano Information for Alaska

USGS Volcano Information for Alaska
While Alaska is the least densely populated state in the United States, the United States Geological Survey (USGS) estimates that Alaska is home to more than 130 volcanoes and volcanic fields that have been active in the last 2 million years.



USGS Alaska Volcano Observatory

Founded in 1988, the Alaska Volcano Observatory monitors, assesses and dispenses information about the Alaskan volcanoes.

Eruption Records

People have been recording Alaskan volcanic activity since approximately 1760. As of 2009, the largest volcanic eruption in Alaska's historical time period was Novarupta/Katmai in 1912.

AVO Stations

In 2008, the Alaskan Volcano Observatory was capable of monitoring more than 30 volcanoes with 200 seismic stations.


The Aleutian Arc contains the majority of the Alaskan volcanoes. Approximately 80 volcanoes are located in the 1,550-mile-long Aleutian Arc.

Eruption Frequency

Since 1760, there have been approximately 27 volcanoes in Alaska with 230 confirmed eruptions. However, there are more than 400 unconfirmed possible eruptions from 50 additional volcanoes.


Article Written By Stephanie D

Stephanie D has been writing and exploring the outdoors for as long as she can remember. She has spent time climbing across the United States and backpacking out west. Stephanie D earned her Bachelor of Science in computer science from the Massachusetts Institute of Technology.

Don't Miss a Thing!

All our latest outdoor content delivered to your inbox once a week.



We promise to keep your email address safe and secure.