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Authors: De Gregorio, S.*
Federico, C.*
Cappuzzo, S.*
Favara, R.*
Giudice, G.*
Gurrieri, S.*
Boschi, E.*
Title: Stress-induced temperature variations in groundwater of the Monferrato area (north-western Italy)
Title of journal: Geofluids
Series/Report no.: /12 (2012)
Publisher: Wiley-Blackwell
Issue Date: May-2012
DOI: 10.1111/j.1468-8123.2011.00348.x
Keywords: groundwater monitoring
pore fluid pressure;
tectonic stress
Abstract: Although characterized by low seismicity, the Monferrato area of north-western Italy was affected by earthquakes, of magnitude M5.1 and M4.8, in 2000 and 2001. At the same time, marked changes were recorded in water temperature and chemistry in several wells within the epicentral area. In May 2004, an automatic network for the continuous monitoring of groundwater was installed in selected wells to study the phenomenon. Here, we report on data collected during a 3-year period of groundwater monitoring. During the first year, episodes of water heating (by up to 20°C) were observed in one monitored well. The temporal analysis of the seismic activity recorded in the area revealed as almost all seismic events occurred during the period of elevated water temperatures. The similar timing of earthquakes and groundwater-temperature anomalies suggests that both may be triggered by the same processes acting in the crust.
Appears in Collections:03.02.04. Measurements and monitoring
03.02.02. Hydrological processes: interaction, transport, dynamics
Papers Published / Papers in press

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