HR: 15:20h
AN: G43C-07    [Abstracts]
TI: The shallow plumbing system of Stromboli volcano as imaged from 1 Hz instantaneous GPS positions
AU: Mattia, M
EM: mattia@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Sez. di Catania P.zza Roma 2, Catania, 95123 Italy
AU: Rossi, M
EM: rossi@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Sez. di Catania P.zza Roma 2, Catania, 95123 Italy
AU: Guglielmino, F
EM: guglielmino@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Sez. di Catania P.zza Roma 2, Catania, 95123 Italy
AU: Aloisi, M
EM: aloisi@ct.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Sez. di Catania P.zza Roma 2, Catania, 95123 Italy
AU: * Bock, Y
EM: ybock@ucsd.edu
AF: Scripps Institution of Oceanography, IGPP 0225 9500 Gilman Drive, La Jolla, CA 92093 United States
AB: The Stromboli volcano (Aeolian Islands, Italy) erupted suddenly on 28 December 2002 after a 17-year period of typically persistent but moderate eruptive activity, followed two days later by a tsunamigenic landslide on its NW flank (Sciara del Fuoco) felt in the coastal areas of southern Italy. Three continuous GPS stations were quickly deployed near the volcano's rim sampling at 1 Hz, with instantaneous positions computed with a latency of 1 s relative to a fourth station on its flank. We report on two deformation episodes. A vent migration on 16-17 February 2003 caused significant displacements at only one site and contributed to the decision not to issue a warning of an impending tsunamigenic landslide. The second episode on 5 April 2003, a paroxystic explosion from the summit crater, allowed us to model, for the first time with geodetic data, the shallow magma chambers that give rise to Strombolian explosive activity.
DE: 8414 Eruption mechanisms
DE: 8419 Eruption monitoring (7280)
DE: 8494 Instruments and techniques
DE: 1243 Space geodetic surveys
DE: 1294 Instruments and techniques
SC: Geodesy [G]
MN: 2004 AGU Fall Meeting