Actas de congresos
The Spatial Extent Of Thermal Anomalies At Lascar Volcano
Registro en:
9781424495658; 9781424495665
International Geoscience And Remote Sensing Symposium (igarss). , v. , n. , p. 1557 - 1560, 2010.
10.1109/IGARSS.2010.5652858
2-s2.0-78650879778
Autor
Murphy S.W.
De Souza Filho C.R.
Oppenheimer C.
Institución
Resumen
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. © 2010 IEEE.
1557 1560 De Silva, S.L., Francis, P.W., (1991) Volcanoes of the Central Andes, , Springer Francis, P.W., Rothery, D.A., Using the landsat thematic mapper to detect and monitor active volcanoes: An example from northern chile (1987) Geology, pp. 614-617 Oppenheimer, C., Francis, P.W., Rothery, D.A., Carlton, R.W., Glaze, L.S., Infrared image analysis of volcanic thermal features: Láscar volcano, Chile, 1984-1992 (1993) Journal of Geophysical Research, pp. 4269-4286 Wooster, M.J., Long-term infrared surveillance of lascar volcano: Contrasting activity cycles and cooling pyroclastics (2001) Geophysical Research Letters, pp. 847-850 Matthews, S.J., Gardeweg, M.C., Sparks, R.S.J., The 1984 to 1996 cyclic activity of lascar volcano, northern chile: Cycles of dome growth, dome subsidence, degassing and explosive eruptions (1997) Bull. Volcanol., pp. 72-82 Matthews, S.J., Jones, A.P., Gardeweg, M.C., Lascar volcano, northern chile: Evidence for steady-state disequilibrium (1994) Journal of Petrology, pp. 401-432 Gardeweg, M.C., Fuentealba, G., Murillo, M., Petit-Breuth, M.E., Volcan lascar. Geologia y evaluacion del riesgo volcanoico: Altiplano II region (1994) Servicio Nacional de Geologia y Mineria, , Chile Realmuto, V.J., Separating the effects of temperature and emissivity: Emissivity spectrum normalization (1990) Proc. 2 nd TIMS Workshop, pp. 90-55. , Pasadena, CA: Jet Propul. Lab., JPL Publication Stix, J., Gaonac'h, H., Gas, plume and thermal monitoring (2000) Encyclopedia of Volcanoes, pp. 1141-1165. , (eds) H. Sigurdsson, B.F. Houghton, S.R. McNutt, H. Rymer, J. Stix, Elsevier Aguilera, F., Martinez, C., Tassi, F., Viramonte, J., Medina, E., Vargas, H., Soto, I., Actividad del volcán lascar en el periodo 2000-2002 (2003) 10° Congreso GeológicoChileno, , Concepcion, Chile Lascar (2000) Bull. Global Volcanism Network, 25 (6), p. 1. , Smithsonian Institute Lascar (2003) Bull. Global Volcanism Network, 28 (3), pp. 10-11. , Smithsonian Institute Lascar (2004) Bull. Global Volcanism Network, 29 (1), pp. 2-4. , Smithsonian Institute Lascar (2005) Bull. Global Volcanism Network, 30 (4), p. 1. , Smithsonian Institute Lascar (2006) Bull. Global Volcanism Network, 31 (4), p. 6. , Smithsonian Institute Lascar (2007) Bull. Global Volcanism Network, 32 (9), pp. 4-5. , Smithsonian Institute Viramonte, J., Rodríguez, L., Becchio, R., Castro, S., Watson, M., Aguilera, F., Recent studies at lascar volcano, chile: A multidisciplinary monitoring effort to understand eruptive patterns and products (2006) Cities on Volcanoes, 4. , Quito, Ecuador