This is a satellite image of Anchorage, Alaska. The red line shows the equivalent area that the 2009 Redoubt lava dome would cover - to a depth of 3 feet! The dome is about 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.
Credit: The satellite image is used courtesy of ESRI. Doug Robbins added the Redoubt volume comparison.Use Restriction: Please cite ESRI, Doug Robbins, and AVO when using this image.
Full Resolution.