HR: 0800h
AN: V31A-0603    [Abstracts]
TI: Investigation of Temperatures, Thermal Fluxes and Morphological Features in Relation to Dome Growth at Bezymianny Volcano Using a Forward Looking Infrared Radiometer (FLIR).
AU: * Steffke, A M
EM: andrea@gi.alaska.edu
AF: Alaska Volcano Observatory, Geophysical Institue, University of Alaska Fairbanks, 903 Koyukuk Drive P.O. Box 757320 , Fairbanks, AK 99775 United States
AU: Dehn, J
EM: jdehn@gi.alaska.edu
AF: Alaska Volcano Observatory, Geophysical Institue, University of Alaska Fairbanks, 903 Koyukuk Drive P.O. Box 757320 , Fairbanks, AK 99775 United States
AB: Bezymianny Volcano is one of the most active volcanoes located on the Kamchatka Peninsula, Russia. Bezymianny erupts almost biannually and for the past 40 years has followed the same basic eruption pattern. Eruptions start with the slow growth of the lava dome followed by collapse which may lead to the formation of pyroclastic flows. Utilizing a Forward Looking Infrared Radiometer (FLIR) thermal images were acquired in August of 2004 to measure the thermal output of the volcano in order to gain a better understanding of lava dome growth processes at Bezymianny Volcano. Thermal images were used to create a mosaic of the dome that was initially used to determine the temperature distribution on the lava dome and the total thermal energy being emitted from the volcano. Analysis showed that even during periods of repose Bezymianny still emits a significant amount of thermal energy, approximately 250 MW. Flow and weathering features are also identified on the dome in the FLIR imagery. The combination of thermal flux and morphological features on the dome's surface enables different dome processes to be distinguished from one another including lobe growth, fumarolic activity and fracturing on the dome. Even though only one data set was available for processing the images did prove useful and will allow comparisons to be made with thermal images acquired in years to come.
DE: 8485 Remote sensing of volcanoes
DE: 8494 Instruments and techniques
SC: Volcanology, Geochemistry, Petrology [V]
MN: Fall Meeting 2005