Photographic documentation of the evolution of Crater Glacier, Mount St. Helens, Washington, September 2006–November 2009

Lava-dome emplacement through a glacier was observed for the first time during the 2004-08 eruption of Mount St. Helens and documented using photography, photogrammetry, and geodetic measurements. Previously published reports present such documentation through September 2006; this report extends that documentation until November 2009.