2004, the AVO reported the presence of a collapse pit, filled with water forming a new crater lake, in the ice and snow cover on the summit. This lake may have been caused by an increase in heat flow through the summit lava dome. On May 3, 2005, a debris flow was observed in webcam images, as well as by a nearby pilot. A subsequent overflight revealed that much of the sitting pond within the melt hole had drained away, a notable depth. References External links Volcano World article about Spurr Mount Spurr Webcam Volcanoes of Kenai Peninsula Borough, Alaska Mountains of Kenai Peninsula Borough, Alaska Mountains of Alaska Stratovolcanoes of the United States Subduction volcanoes Volcanoes of Alaska Active volcanoes Volcanic crater lakes 20th-century volcanic events Calderas of Alaska