HR: 0800h
AN: V31A-0295    [Abstracts]
TI: Monitoring of Ash Ejection from Ecuadorean Volcanoes Using Infrasound
AU: * Hetzer, C
EM: claus@olemiss.edu
AF: National Center for Physical Acoustics, The University of Mississippi, 1 Coliseum Drive, University, MS 38677, United States
AU: Garces, M
EM: milton@isla.hawaii.edu
AF: Infrasound Laboratory, The University of Hawaii at Manoa, 73-4460 Queen Kaahumanu Hwy #119, Kailua-Kona, HI 96740, United States
AU: Fee, D
EM: dfee@isla.hawaii.edu
AF: Infrasound Laboratory, The University of Hawaii at Manoa, 73-4460 Queen Kaahumanu Hwy #119, Kailua-Kona, HI 96740, United States
AU: Bass, H
EM: pabass@olemiss.edu
AF: National Center for Physical Acoustics, The University of Mississippi, 1 Coliseum Drive, University, MS 38677, United States
AU: McCormack, D
EM: dmccorma@nrcan.gc.ca
AF: Geological Survey of Canada, 601 Booth Street, Ottawa, ONT K1A 0E8, Canada
AB: Two infrasound arrays with 100-meter apertures have been deployed in Ecuador in order to monitor volcanic eruptions that may produce ash clouds. Data is collected continuously and streamed via satellite and internet links to processing centers that apply array processing techniques to display acoustic detections of volcanic eruptions in near-real-time. These data products are delivered to the DC Volcanic Ash Advisory Center (VAAC), and have been used as additional confirmation of an eruption in ash advisories provided by the VAAC to commercial aircraft. Considerable research has been put into identifying the types of acoustic signals that indicate ash injection, as well as eliminating false alarms and reducing the latency between data collection and notification. Research conducted to date will be discussed, as well as several case studies wherein infrasound data proved useful for quick detection of eruptions. A brief summary of the advantages gained from use of this technique will also be presented.
UR: http://www.isla.hawaii.edu/volcano/ashe.shtml
DE: 8419 Volcano monitoring (7280)
DE: 8485 Remote sensing of volcanoes
DE: 9360 South America
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting