HR: 1330h
AN: V23A-03    [Abstracts]
TI: On the Interplay Among Structure, Regional and Magmatic Stress at Calderas: a Detailed Study of Campi Flegrei Earthquakes
AU: * Troise, C
EM: claudia@ov.ingv.it
AF: Osservatorio Vesuviano-INGV, V. Diocleziano,328, Naples, 80125 Italy
AB: This work presents new improved seismicity maps for Campi Flegrei earthquakes, located in a new 3D model obtained by local earthquakes tomography as well as from direct laboratory measurements of seismic velocities on rock samples. Earthquake locations are obtained from a new Bayesian algorithm, which gives both accurate point locations and maps of earthquake/moment density. Coulomb stress changes are computed with a FEM model which takes into account the presence of caldera ring faults, regional stress and magma overpressure in a shallow chamber put in evidence by seismic studies. The model enlight the important role played by both structural and regional/local stress in local earthquake generation at calderas, and gives a detailed explanation for the occurrence of earthquakes at Campi Flegrei during unrest episodes
DE: 5104 Fracture and flow
DE: 7209 Earthquake dynamics and mechanics
DE: 7223 Seismic hazard assessment and prediction
DE: 7230 Seismicity and seismotectonics
DE: 7280 Volcano seismology (8419)
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2005 Joint Assembly