Tungurahua: Difference between revisions

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km NW, and 110 km NE at an altitude of 7.9 km a.s.l. The
km NW, and 110 km NE at an altitude of 7.9 km a.s.l. The
larger explosions during the morning were followed by pyroclastic flows that
larger explosions during the morning were followed by pyroclastic flows that
descended the SW and NW flanks.  
descended the SW and NW flanks. The Washington VAAC issued a volcanic ash alert at .
<ref>http://www.ssd.noaa.gov/VAAC/messages.html<\ref>


On 17 December satellite images showed ash plumes drifting 50-130 km NE,
On 17 December satellite images showed ash plumes drifting 50-130 km NE,
Line 48: Line 49:




http://www.ssd.noaa.gov/VAAC/messages.html


Sources: <br>  
Sources: <br>  

Revision as of 18:07, 20 December 2012

Tungurahua
Elevation 5,023 m
Latitude 1° 28′ 1″ S
Longitude 78° 26′ 30″ W

Tungurahua is an active volcano in Ecuador.


IASI SO2 monthly mean over Ecuador for the period Julyto December 2007. The retrieval assumed an SO2 plume height of 600 mb. Credit: Dr Elisa Carboni

Eruptions

16 December 2012

IASI SO2 flag over Ecuador for the orbit of 16th Dec. 2012 14 UTC. The top plot shows the 'plume' pixels where the probability of SO2 false detection is less than 1/10^5. The bottom plot show the SO2 flag for all the IASI pixels (this shows the locations sampled by IASI for this overpass). Credit: Dr Elisa Carboni

On 16 December the ash plume, generated by a large explosion, rose to a maximum height of 7 km and contained lightning. [1] Other explosions generated ash plumes up to 2 km high. Satellite imagery showed ash plumes drifting 140 km NW, and 110 km NE at an altitude of 7.9 km a.s.l. The larger explosions during the morning were followed by pyroclastic flows that descended the SW and NW flanks. The Washington VAAC issued a volcanic ash alert at . Cite error: Closing </ref> missing for <ref> tag [2]

Here a fast look at IASI data, with ours SO2 detection flag (= a fast linear retrieval with a lot of assumptions, like the standard atmospheric profiles etc...) [3] [4]. More quantitative data (a proper retrieval) will follow.


Sources:

[5],
Instituto Geofísico-Escuela Politécnica Nacional (IG) [6],
Washington Volcanic Ash Advisory Center (VAAC)

References

  1. ↑ Smithsonian/USGS Volcanic Activity Report http://www.volcano.si.edu/reports/usgs/
  2. ↑ BBC News http://www.bbc.co.uk/news/world-latin-america-20765920
  3. ↑ Walker, J.C., E. Carboni, A. Dudhia, R.G. Grainger: Improved Detection of Sulphur Dioxide in Volcanic Plumes using Satellite-based Hyperspectral Infra-red Measurements: Application to the Eyjafjallaj?okull 2010 Eruption, J. Geophys. Res., 117, doi:10.1029/2011JD016810, 2012.
  4. ↑ Walker, J. C., Dudhia, A., & Carboni, E. (2011). An effective method for the detection of trace species demonstrated using the MetOp Infrared Atmospheric Sounding Interferometer. ATMOS MEAS TECH, 4(8), 1567-1580. doi:10.5194/amt-4-1567-2011
  5. ↑ http://www.volcano.si.edu/world/volcano.cfm?vnum=1502-08=&volpage=weekly
  6. ↑ http://www.igepn.edu.ec/
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