title: The LVD signals during the early-mid stages of the L'Aquila seismic sequence and the radon signature of some aftershocks of moderate magnitude.
abstract: The L'Aquila seismic swarm culminated with the mainshock of April 6, 2009 (ML = 5.9). Here, we report and analyze the Large Volume Detector (LVD, used in neutrinos research) low energy traces (∼0.8 MeV), collected during the early-mid stages of the seismic sequence, together with the data of a radon monitoring experiment. The peaks of LVD traces do not correlate with the evolution and magnitude of earthquakes, including major aftershocks. Conversely, our radon measurements obtained by utilizing three automatic stations deployed along the regional NW-SE faulting system, seem to be, in one case, more efficient. In fact, the timeseries collected on the NW-SE Paganica fracture recorded marked variations and peaks that occurred during and prior moderate aftershocks (with ML > 3). The Paganica monitoring station (PGN) seems to better responds to active seismicity due to the fact that the radon detector was placed directly within the bedrock of an active fault. It is suggested that future networks for radon monitoring of active seismicity should preferentially implement this setting.
authors.affiliation: Dipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso 35, 10125 Torino, Italy; NatRisk, Centro Interdipartimentale sui Rischi Naturali in Ambiente Montano e Collinare, Università degli Studi di Torino, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Cigolini
authors.affiliation: Dipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso 35, 10125 Torino, Italy; Dipartimento di Scienze della Terra, Università di Firenze, Via Giorgio La Pira 4, 50121 Firenze, Italy. Electronic address: marco.laiolo@unito.it.
authors.forename: M
authors.initials: M
authors.lastname: Laiolo
authors.affiliation: Dipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso 35, 10125 Torino, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Coppola
mesh_terms: D055866:Earthquakes; D011886:Radon / Q000032:analysis*
chemical_list: D011886:Radon
keywords: Earthquake precursors; LVD traces; Networks for radon monitoring; Radon monitoring