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.
The satellite image is used courtesy of ESRI. Doug Robbins added the Redoubt volume comparison.
Please cite ESRI, Doug Robbins, and AVO when using this image.
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