Spurr volcano (Cook Inlet, SW Alaska) activity update
Di, 22. Jan 2013, 08:17
08:17 AM | VON: T- Alle News zu: Spurr Vulkan
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Mo, 21. Jan 2013, 06:17
Small local earthquakes continue to appear on seismic recordings. ... Read all
Mi, 16. Jan 2013, 10:15
A series of pulsating signals occurred on seismograms at Mount Spurr volcano (AK) earlier on 15 Jan, earthquake-report.com mentions. ... Read all
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Mi, 27. Jun 2012, 06:00
AVO reported that a minor increase in seismicity at Spurr was detected at about 0500 on 25 June, lasted about 45 minutes, and was characterized by several discrete M1earthquakes. The signals recorded were consistent with seismic energy generated by an energetic flow of water, possibly indicating a glacial outburst flood on the lower S flank. The next day seismic levels had declined to near background and no additional flowage signals were observed. ... Read all
Mi, 4. Jan 2006, 06:00
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. ... Read all
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Mi, 21. Sep 2005, 06:00
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
Mi, 14. Sep 2005, 06:00
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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Mi, 10. Aug 2005, 06:00
The level of seismic activity at Mt. Spurr decreased during the previous month, but remained above background levels during 5-12 August. Gas and heat emissions remained at elevated levels, and minor steaming continued from the summit "melt/collapse pit." Satellite imagery showed no indications that an eruption was imminent. ... Read all
Mi, 11. Mai 2005, 06:00
Elevated levels of seismicity continue to be recorded during 6-13 May. The AVO webcam images showed small steam plumes during the early part of this week. A pilot report received on 9 May described a small steam plume reaching 60-100 m (200-300 feet) above the summit crater. ... Read all
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Mi, 4. Mai 2005, 06:00
An approximately 500-m-long debris flow emanating from the ice and snow ESE of the summit melt pit was seen from Anchorage and confirmed by an overflight on 2 May. This debris flow is similar in size and location to those observed in July 2004, just prior to first recognition of the summit melt pit. Clear views of the melt pit showed increased steam emanating from recently exposed rock around the lake, which coalesced to form a weak steam plume that rose above the rim of the melt pit. ... Read all
Mi, 27. Apr 2005, 06:00
During 22-29 April, elevated levels of seismicity continued to be recorded at Spurr. Thermal imagery taken on 25 April revealed that temperatures in the summit melt-pit region were similar to those recorded in September 2004, with values as high as 40 degrees Celsius in scattered patches of exposed rock. The lake in the summit crater continued to be discolored, and there was a strong scent of sulfur in the area, indicating continued gas emission. ... Read all
