HR: 1340h
AN: V33C-1478    [Abstracts]
TI: Preliminary Analysis of Thermal Flux Associated With Dome Growth of Bezymianny Volcano Using Spaceborne Thermal Infrared Data
AU: * Steffke, A
EM: andrea@gi.alaska.edu
AF: Alaska Volcano Observatory, Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive P.O. Box 757320, Fairbanks, AK 99775-7320 United States
AU: Dehn, J
EM: jdehn@gi.alaska.edu
AF: Alaska Volcano Observatory, Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive P.O. Box 757320, Fairbanks, AK 99775-7320 United States
AU: Dean, K
EM: ken.dean@gi.alaska.edu
AF: Alaska Volcano Observatory, Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive P.O. Box 757320, Fairbanks, AK 99775-7320 United States
AB: Bezymianny volcano is considered one of the most active volcanoes on the Kamchatka Peninsula, Russia. Bezymianny erupts on average one to two times per year, usually following the same cyclic process from slow growth of the dome to dome failure and collapse. These dome processes are observed in satellite data as variations in thermal flux that result in thermal anomalies. Using satellite data the relationship between thermal anomalies and the growth of active lava domes can be determined using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Advanced Very High Resolution Radiometer (AVHRR), Landsat Enhanced Thematic Mapper (ETM) +, and Moderate Resolution Imaging Spectroradiometer (MODIS). Preliminary thermal flux calculations derived for the fall 2000 eruption of Bezymianny suggest that the thermal flux at Bezymianny increases with time up to the October 2000 collapse of the dome. It is found that increased periods of thermal flux correlate with seismic crisis at the lava dome. Linking these data sets can provide a useful tool to predict future explosive eruptions at Bezymianny. Field measurements of thermal flux were gathered for Bezymianny using a Forward Looking Infrared Radiometer(FLIR) in the summer of 2004. The thermal flux measurements from the field will be compared to the most concurrent satellite data to validate and calibrate observations and to improve satellite derived flux calculations. Eventually, increases in thermal flux will be incorporated into volcano monitoring as a precursor signal to explosive eruptions at domes.
DE: 8419 Eruption monitoring (7280)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2004 AGU Fall Meeting