This is a photograph of Flattop Mountain, a popular peak near Anchorage, AK. The red line shows the equivalent volume of the 2009 Redoubt lava dome - 70 million cubic meters. This volume was calculated by USGS geologist Angie Diefenbach at the Cascades Volcano Observatory, using oblique photos taken by AVO geoscientists. http://www.avo.alaska.edu/image.php?id=19641

This is a photograph of Flattop Mountain, a popular peak near Anchorage, AK. The red line shows the equivalent volume of the 2009 Redoubt lava dome - 70 million cubic meters. This volume was calculated by USGS geologist Angie Diefenbach at the Cascades Volcano Observatory, using oblique photos taken by AVO geoscientists.

http://www.avo.alaska.edu/image.php?id=19641