HR: 0800h
AN: V21A-0384    [Abstracts]
TI: Thermal Imaging Applied For Studying The Spreading Of A'a' Lava Flows During The 2002- 2003 Stromboli Effusive Eruption
AU: * lodato, l
EM: lodato@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma, 2, Catania, 95123, Italy
AU: Spampinato, L
EM: spampinato-l@ct.ingv.it
AF: Department of Geography, University of Cambridge, Downing Place, CB2, Cambridge, 3EN, United Kingdom
AU: Harris, A
EM: harris@higp.hawaii.edu
AF: HIGP/SOEST, University of Hawai'I, 1680 East West Road, Honolulu, 96822, United States
AU: Calvari, S
EM: calvari@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Piazza Roma, 2, Catania, 95123, Italy
AU: Dehn, J
EM: jdehn@gi.alaska.edu
AF: Alaska Volcano Observatory, Geophysical Institute, University of Alaska, Fairbanks, 903 Koyukuk Drive, Fairbanks, 99775-7320, United States
AU: patrick, m
EM: patrick@higp.hawaii.edu
AF: Alaska Volcano Observatory, Geophysical Institute, University of Alaska, Fairbanks, 903 Koyukuk Drive, Fairbanks, 99775-7320, United States
AB: On 28 December 2002 Stromboli Volcano (Aeolian Islands, Italy) was site of a new effusive activity. Lava flows emplacing onto the steep slopes of the Sciara del Fuoco (Calvari et al. 2005), formed two lava flow fields, separated in space and time and fed by different vents. The first flow field formed in the middle of the Sciara del Fuoco and was fed by a vent located at 550 m a.s.l. until 15 February 2003. This resulted in a compound flow field of numerous overlapping 'a'a flow units. The second flow field emplaced mainly in the upper eastern part of the Sciara del Fuoco and was fed by a main vent located at 670 m a.s.l. Activity here lasted until the end of the eruption on 21 July 2003, and formed a thick compound lava shield containing a complex lava tube network (Lodato et al., 2007). Daily handheld Forward Looking InfraRed (FLIR) thermal camera helicopter surveys allowed us to record: (1) the development of lava channels and tubes, (2) the formation of tumuli, (3) the opening and closure of ephemeral vents, and (4) the discrimination of active lava flows. Using these data, it was possible to track the evolution of the lava flow field and associated channel-tube system, including the establishment of the main lava tube, expansion of the network resulting from branching of the tube system, and the shut down of the system during July 2003. Thermal measurements also permitted lava tube mapping and the discrimination of three orders of tumuli (Lodato et al., 2007). The development and stability of these lava flow field structures are the result of the interaction between different parameters including effusion rate and topographic gradient.
DE: 8400 VOLCANOLOGY
DE: 8414 Eruption mechanisms and flow emplacement
DE: 8425 Effusive volcanism
DE: 8429 Lava rheology and morphology
DE: 8486 Field relationships (1090, 3690)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting