Spurr volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 4 January-10 January 2006 (Continuing Activity)
Wed, 4 Jan 2006, 06:00 | BY: VN
Seismicity remained above background levels at Spurr during 30 December to 6 January. Clear satellite and web camera views of the volcano showed no unusual activity. Spurr remained at Concern Color Code Yellow.Source: US Geological Survey Alaska Volcano Observatory (AVO)
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From: Global Volcanism Program, 2006. Report on Spurr. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 4 January-10 January 2006. Smithsonian Institution and US Geological Survey.
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Wed, 21 Sep 2005, 06:00
Spurr volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 21 September-27 September 2005 (Continuing Activity)
Seismicity at Spurr during 16-23 September remained above background levels, but the overall rate continued to gradually decline. Preliminary data from a gas-sensing flight earlier in the week showed a substantial reduction in gas emissions compared to previous measurements taken in May 2005. The declining seismicity, reduced gas emission, and the changing summit-lake color (thought to reflect lower levels of acidity), all suggested a reduced level of volcanic activity. ... Read all
Wed, 14 Sep 2005, 06:00
Spurr volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 14 September-20 September 2005 (Continuing Activity)
During 9-16 September, seismicity at Spurr remained above background levels, but there were several indications that the level of unrest was declining. AVO reported that recent observations of the summit lake showed a change in the water color from slate gray to blue-green, which could be indicative of decreasing sulfur-dioxide gas emissions. In addition, there were no observations of the vigorous upwelling of gases that had been seen in the lake earlier this summer. ... Read all
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