DEM

http://ned.usgs.gov/historic.html

This is a picture of Mount St. Helen after it erupted in a DEM (Digital Elevation Models) format.  In this image above one can easily see the quick rise in elevation of the volcano along with the large crater that was left after the eruption.  It also provides a general understand of the land features that surround the volcano.  The image also clearly shows what the terrain is like around the side walls of the volcano.