HR: 0800h
AN: NG31A-0847    [Abstracts]
TI: Continuous Monitoring of Groundwater on Monferrato Area (Piemonte, North Italy): Correlation Analysis Between Seismic Events and Geochemical Variations
AU: * De Gregorio, S
EM: s.degregorio@pa.ingv.it
AF: Istituto Nazionale Geofisica e Vulcanologia - Palermo, V. Ugo La Malfa 153, Palermo, 90146 Italy
AU: Capasso, G
AF: Istituto Nazionale Geofisica e Vulcanologia - Palermo, V. Ugo La Malfa 153, Palermo, 90146 Italy
AU: Cinti, D
AF: Istituto Nazionale Geofisica e Vulcanologia - Roma, V. Vigna Murata 605, Roma, 00143 Italy
AU: Favara, R
AF: Istituto Nazionale Geofisica e Vulcanologia - Palermo, V. Ugo La Malfa 153, Palermo, 90146 Italy
AU: Federico, C
EM: federico@pa.ingv.it
AF: Istituto Nazionale Geofisica e Vulcanologia - Palermo, V. Ugo La Malfa 153, Palermo, 90146 Italy
AU: Galli, G
AF: Istituto Nazionale Geofisica e Vulcanologia - Roma, V. Vigna Murata 605, Roma, 00143 Italy
AU: Giudice, G
AF: Istituto Nazionale Geofisica e Vulcanologia - Palermo, V. Ugo La Malfa 153, Palermo, 90146 Italy
AU: Gurrieri, S
AF: Istituto Nazionale Geofisica e Vulcanologia - Palermo, V. Ugo La Malfa 153, Palermo, 90146 Italy
AU: Pizzino, L
AF: Istituto Nazionale Geofisica e Vulcanologia - Roma, V. Vigna Murata 605, Roma, 00143 Italy
AU: Pongetti, F
AF: Istituto Nazionale Geofisica e Vulcanologia - Roma, V. Vigna Murata 605, Roma, 00143 Italy
AU: Quattrocchi, F
AF: Istituto Nazionale Geofisica e Vulcanologia - Roma, V. Vigna Murata 605, Roma, 00143 Italy
AU: Voltattorni, N
AF: Istituto Nazionale Geofisica e Vulcanologia - Roma, V. Vigna Murata 605, Roma, 00143 Italy
AB: Variations in the chemical-physical and geochemical parameters of groundwater correlated to seismic and volcanic activity were wide documented by several authors (Carapezza et al., 1980; Capasso et al., 1991; Tedesco et al.; 1995; Gurrieri & Valenza 1988; Sano et al., 1998; Gurrieri & Giudice 2004). According to these results a project for groundwater geochemical surveillance has been started in Monferrato area (Piemonte north Italy). Since August 2000 this area was characterized by seismic activity with earthquake intensity up to 5.2 Md. Other seismic events of lower magnitude were also reordered. Some geochemical anomalies were observed in groundwater at the occurrence of the seismic activity (Quattrocchi et al., 2003). In may 2004, a network for continuous monitoring was installed. It consists of four geochemical continuous monitoring stations placed close to Nizza-Monferrato town (At). The stations are able to recorder, hourly, water temperature, pH, electrical conductivity, piezometric level and the main atmospheric parameters such as T, P, Rain, RU, Speed and Wind Direction. A first thermo anomaly was noted in a hand excavate well denoted as Ronello. The water start to heating since June, 8, 2004, and its temperature rises from 13 to $18\deg$C in four days. Nine days after, on June, 17, 2004, a seismic event of 2.8 Md occurred. In the subsequent months both the temperature and conductivity show very complex trend, likely due to the stress field persistence. During the August month the temperature roughly decrease from 34 to $18\deg$C and then rise sharply until $25\deg$C. This anomalous behaviour precedes a new seismic events of Md 2.6 occurred on September, 09, 2004.
DE: 7223 Seismic hazard assessment and prediction
DE: 1884 Water supply
DE: 1094 Instruments and techniques
DE: 1099 General or miscellaneous
SC: Nonlinear Geophysics [NG]
MN: 2004 AGU Fall Meeting