HR: 0800h
AN: V41A-0398    [Abstracts]
TI: Tracking of Volcano Fumarole Field Variations Using Real Time, High Temporal Resolution Data From A Permanent Thermal Camera
AU: * Spampinato, L
EM: spampinato-l@ct.ingv.it, ls405@cam.ac.uk
AF: Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Catania, Piazza Roma 2, Catania, CT 95123, Italy
AU: * Spampinato, L
EM: spampinato-l@ct.ingv.it, ls405@cam.ac.uk
AF: Department of Geography, University of Cambridge, Downing Place, Cambridge, CB2 3EN, United Kingdom
AU: Lodato, L
EM: lodato@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Catania, Piazza Roma 2, Catania, CT 95123, Italy
AU: Harris, A J
EM: harris@higp.hawaii.edu
AF: HIGP/SOEST, University of Hawai'i, 1680 East-West Road, Honolulu, Hawaii, 96822, United States
AU: Dehn, J
EM: jdehn@gi.alaska.ed
AF: Alaska Volcano Observatory, Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Drive, 757320, Fairbanks, Alaska, 99775-7320, United States
AB: In June 2006, we installed an A 40 Forward Looking InfraRed (FLIR) thermal camera at Vulcano's La Fossa Crater (Aeolian Islands, Italy) for monitoring the fumarole activity. This was installed on the inner southern flank of the crater at a distance of about 400 m from the fumarole field (target pixel size of ~ 50 cm). Our aim was the collection of identical geometry and resolution thermal images that would have improved our ability to track temporal and spatial thermal trends of the fumarole field. In January 2007, a permanent weather station, recording air temperature, pressure, relative humidity and rainfall rate, was installed in the same site of the camera. An electronic micro-controller board was developed to interface the station with the thermal camera allowing the automatic and real-time atmospheric corrections within the camera software. The whole system is remotely controlled through wireless transmission from INGV Catania Section, where in real-time temperature and atmospheric data are transmitted, stored and automatically analyzed. Here, we present the first year of data showing the temperature distribution frequency at La Fossa's fumarole field. Analysis were carried out on the raw images and only on data collected between 7:00 pm and 7:00 am (GMT) to prevent the maximum heat release from the ground. Additionally, to exclude seasonal and weather effects, we fixed a preliminary temperature threshold of 70oC. Hot pixels above the threshold were plotted versus temperature to obtain daily temperature distribution frequencies. Additionally, the average of daily maximum temperatures for each of the main fumaroles (control fumaroles) versus time was plotted. Finally, to better imagine the hottest spots, their location and, through periodic comparison, their migration (fumarole field spatial variations), we used 3D diagrams.
DE: 7280 Volcano seismology (8419)
DE: 8419 Volcano monitoring (7280)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting