HR: 0800h
AN: V21C-0626    [Abstracts]
TI: An Original Approach for an Automatic Bulletin of Volcanic Activity in Indonesia : the First Results of Infrasound Array in Kalimantan
AU: * Guilbert, J
EM: jocelyn.guilbert@cea.fr
AF: CEA/DASE, Laboratoire de Geophysique, BP12, Bruyeres-le-Chatel, 91680 France
AU: Harjadi, P
EM: prih@bmg.go.id
AF: Badan Meteorologi dan Geophsica, Jl. Angkasa 1 No.2, Kemayoran, Jakarta, 10720 Indonesia
AU: Purbawinata, M
EM: masatje@vsi.dpe.go.id
AF: Directorate of Volcanology and Geological Hazard Mitigation, Jalan Diponegoro 57, Bandung, 40122 Indonesia
AU: James, S
EM: suzon.jammes@cea.fr
AF: CEA/DASE, Laboratoire de Geophysique, BP12, Bruyeres-le-Chatel, 91680 France
AU: Le Pichon, A
EM: alexis.lepichon@cea.fr
AF: CEA/DASE, Laboratoire de Geophysique, BP12, Bruyeres-le-Chatel, 91680 France
AB: The infrasound technology has already shown a unique low-level detectability for the detection of volcanic activity as ash clouds or explosions. This kind of detection and characterization of the volcanic activity is very important for a country like Indonesia where the volcanoes are aligned along more than 5000km of the arc of subduction. Due to the mutual experience and knowledge on meteorological observations, infrasound observation and modelling, the BMG (Indonesia), VSI (Indonesia) and the CEA (France) have decided to cooperate to validate this technology. The central position the Kalimantan Island (Borneo) was identified as the best area to monitor with a good resolution in azimuth all the Indonesian volcanoes. The PMCC bulletins of detection will be presented. These detections are crossed with the available reports of volcanic activity of Indonesia and Philippines. The high sensibility of the infrasound technology is clearly proved. To validate this bulletin, we cross these detections with the detections obtained using the IMS stations around Indonesia to localize the sources. This comparison proves that the Kalimantan infrasound array is ideally situated to survey an important part of the volcanic activity along the Indonesia-Philippines arc. In parallel, we use these infrasonic observations to improve the atmospheric models of wind.
DE: 0468 Natural hazards
DE: 8419 Volcano monitoring (7280)
DE: 8494 Instruments and techniques
SC: Volcanology, Geochemistry, Petrology [V]
MN: Fall Meeting 2005