Celso Reyes - Listen to a volcano! Celso's Volcano pages with photos of volcanoes, especially Alaska volcanoes. http://www.avo.alaska.edu/input/celso/volc_sounds.html- 2.9KB - USGS
Alaska Volcano Observatory The Alaska Volcano Observatory (AVO) is a joint program of the United States Geological Survey (USGS), the Geophysical Institute of the University of Alaska Fairbanks (UAFGI), .. http://www.avo.alaska.edu/- 11.4KB - USGS