HR: 15:25h
AN: T53C-08    [Abstracts]
TI: Recent Results in Geoelectrical Studies od a Seismic Area in Southern Apennine Chain (Italy).
AU: * Lapenna, V
EM: lapenna@imaa.cnr.it
AF: Ist. di Metodologie per l'Analisi Ambientale, C.da S. Loja, Tito Scalo, Tito, I-85050 Italy
AU: Balasco, M
EM: balasco@imaa.cnr.it
AF: Ist. di Metodologie per l'Analisi Ambientale, C.da S. Loja, Tito Scalo, Tito, I-85050 Italy
AU: Colangelo, G
EM: colangelo@imaa.cnr.it
AF: Ist. di Metodologie per l'Analisi Ambientale, C.da S. Loja, Tito Scalo, Tito, I-85050 Italy
AU: Piscitelli, S
EM: piscitelli@imaa.cnr.it
AF: Ist. di Metodologie per l'Analisi Ambientale, C.da S. Loja, Tito Scalo, Tito, I-85050 Italy
AU: Rizzo, E
EM: rizzo@imaa.cnr.it
AF: Ist. di Metodologie per l'Analisi Ambientale, C.da S. Loja, Tito Scalo, Tito, I-85050 Italy
AU: Telesca, L
EM: telesca@imaa.cnr.it
AF: Ist. di Metodologie per l'Analisi Ambientale, C.da S. Loja, Tito Scalo, Tito, I-85050 Italy
AB: Since 1991 it was installed a geophysical monitoring network able to detect geoelectrical, geochemical and seismometric parameters in a seismic active area of Southern Italy. To date a very large data set of ULF electrical time series is available and the possible correlation between anomalous electrical signals and local earthquake activity can be carried out using robust filtering procedures for noise reduction and multifractal techniques for identifying extreme events. Recently the monitoring activity has been focused on Val d'Agri area representing one of the most active seismic zone of Southern Apennine chain. The Val d'Agri is a NW-SE trending intermontane basin formed after Miocene-Pliocen shortening events and controlled by high-angle trastensional and extensional active faults. In this work some recent results regarding the analysis of observational evidences of anomalous electrical signals are analysed and discussed. Finally, for better exploring the site effects governing the electrical signals we perfomed shallow and deep electrical resistivity tomographies in the investigated areas. The possibility to have extremely long period of electrical measurements, the application of novel fractal and multifractal techniques, the knowledge of resisistivity subsurface patterns close the measuring stations disclose the way to better understand the space-time dynamics of electrical signals in the study area.
DE: 8100 TECTONOPHYSICS
DE: 3220 Nonlinear dynamics
DE: 0619 Electromagnetic theory
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting