HR: 0830h
AN: V11C-0516    [PDF]
TI: Correlation of SO$_{2}$ Gas Emissions, Seismicity and Thermal Signals at Santiaguito, Guatemala
AU: * Branan, Y K
EM: ykbranan@mtu.edu
AF: Michigan Technological University, Geological and Mining Engineering and Sciences 1400 Townsend Drive, Houghton, MI 49931 United States
AU: Watson, I
EM: watson@mtu.edu
AF: Michigan Technological University, Geological and Mining Engineering and Sciences 1400 Townsend Drive, Houghton, MI 49931 United States
AU: Harris, A J
EM: harris@higp.hawaii.edu
AF: University of Hawai'i, Hawai'i Institute of Geophysics and Planetology 1680 East West Road, Honolulu, HI 96822 United States
AU: Rose, W
EM: raman@mtu.edu
AF: Michigan Technological University, Geological and Mining Engineering and Sciences 1400 Townsend Drive, Houghton, MI 49931 United States
AU: Bluth, G J
EM: gbluth@mtu.edu
AF: Michigan Technological University, Geological and Mining Engineering and Sciences 1400 Townsend Drive, Houghton, MI 49931 United States
AU: Chigna, G
EM: gchigna@yahoo.com
AF: Insituto Nacional de Sismologia, Vulcanologia, Meteorologia y Hidrologia, 7 Avenida 14-57, Zona 13, Guatemala City, 01013 Guatemala
AU: Mota, M
EM: insivumeh@insivumeh.gob.gt
AF: Insituto Nacional de Sismologia, Vulcanologia, Meteorologia y Hidrologia, 7 Avenida 14-57, Zona 13, Guatemala City, 01013 Guatemala
AB: With vertical explosions occurring approximately every 40-50 minutes, the Santiaguito dome at Santa Maria Volcano is an ideal system for examining short-term data patterns. A 3-week long field experiment was performed in January 2003 at the Santiaguito Volcano Observatory in order to record high temporal resolution measurements of volcanic activity. We collected digital seismic data from a single vertical component seismometer located approximately 4 km southeast of the active Caliente vent. A portable infrared thermal monitoring unit was deployed daily to record the temperature of the plume as it left the vent at an acquisition rate of 300 measurements per minute. A miniature ultraviolet spectrometer (MUSE) was also deployed daily to measure the SO$_{2}$ gas emissions just above the vent. This instrument is based on the differential optical absorption spectroscopy (DOAS) technique and allowed for continuous readings at a rate of 36 measurements per minute from approximately 6.5 km south of the Caliente vent. At abstract time, the seismic data is not analyzed, but there is a strong correlation between the SO$_{2}$ emission and thermal data showing that the expulsed gas heats the dome extensively as it is emitted, with a possibility of different signatures indicating certain types of activity such as pyroclastic flows. It is expected that, with the addition of seismic data and the application of analysis of periodicity using Fourier Transforms, the data will elucidate conduit processes, providing additional vital constraints to sub-surface models.
DE: 3360 Remote sensing
DE: 8414 Eruption mechanisms
DE: 8419 Eruption monitoring (7280)
DE: 8494 Instruments and techniques
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting