DocumentCode :
3356262
Title :
The spatial extent of thermal anomalies at Lascar Volcano
Author :
Murphy, Samuel William ; de Souza Filho, Carlos Roberto ; Oppenheimer, Clive
Author_Institution :
Inst. de Geosciencias, Univ. Estadual de Campinas, Campinas, Brazil
fYear :
2010
fDate :
25-30 July 2010
Firstpage :
1557
Lastpage :
1560
Abstract :
Láscar volcano (Chile) has undergone at least 4 vulcanian eruptions and other smaller events between May 2000 and April 2009. Multispectral, thermal infrared images taken during this time by ASTER are used to calculate surface temperatures. The spatial extent and intesity of thermal anomalies are interpreted as varying due to fluctuations in the quantity and temperature of gas being emitted from active fumarole sites. The volcano continues to show a different relationship between thermal radiance and eruptive behaviour to that observed before 1993, the year of the volcano´s greatest historical eruption, indicating that a change in degassing style has persisted since that time. Monitoring the size of thermal anomalies is shown to provide a new perspective for observing and interpreting volcanic processes and may be useful in future predictive models.
Keywords :
land surface temperature; remote sensing; volcanology; AD 2000 05 to 2009 04; ASTER; Chile; Lascar volcano thermal anomaly spatial extent; active fumarole sites; eruptive behaviour; multispectral images; surface temperature; thermal infrared images; thermal radiance; Land surface temperature; Monitoring; Pixel; Temperature distribution; Temperature measurement; Temperature sensors; Volcanoes; Spatial; Temperature; Volcano;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International
Conference_Location :
Honolulu, HI
ISSN :
2153-6996
Print_ISBN :
978-1-4244-9565-8
Electronic_ISBN :
2153-6996
Type :
conf
DOI :
10.1109/IGARSS.2010.5652858
Filename :
5652858
Link To Document :
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