Spurr volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 March-8 March 2005 (Continuing Activity)

Elevated levels of seismicity continued to be recorded at Mt. Spurr during 25 February to 4 March. No activity was observed in satellite and web-camera images.
AVO staff observed that the "ice cauldron" at the volcano (a collapse feature in the ice possibly caused by increased volcanic heat) had continued to grow since its first sighting in August 2004. Continued heat flux was indicated by vigorously upwelling water in the "melt pit lake" (the nearly ice free lake at the bottom of the "ice cauldron"), rapid melting of ice and snow that had fallen into the melt pit lake, and minor steaming from rock surfaces and small melt pits in the vicinity of the summit dome and Crater Peak cone, 3 km S of Spurr's summit. According to AVO, both Spurr and Crater Peak were emitting volcanic gases, including carbon dioxide, sulfur dioxide, and hydrogen sulfide, which may be hazardous to recreational visitors.
Mt. Spurr remained at Concern Color Code Yellow.

Source: US Geological Survey Alaska Volcano Observatory (AVO)
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From: Global Volcanism Program, 2005. Report on Spurr. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 2 March-8 March 2005. Smithsonian Institution and US Geological Survey.