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  • 1
    Publication Date: 2021-01-18
    Description: N.B. L'articolo inizia alla pagina 10 del file PDF. E' preceduto dall'indice degli altri articoli che compaiono su quel volume della rivista.
    Description: Con un accordo tra INGV e SSI (progetto IPODATA) è stata installata strumentazione sismica in cavità artificiali, fin dal 2007. In seguito, in alcuni siti ipogei, si è installata nuova strumentazione geofisica come segue: - nel bunker all’interno del Monte Soratte, presso S. Oreste (RM), è ora attivo un impianto di monitoraggio delle onde elettromagnetiche a bassissima frequenza (banda VLF) ed, associato, un misuratore di radon, il tutto per lo studio di potenziali precursori sismici; - grazie ad una collaborazione tra INGV, UnivAQ e INFN, in un sondaggio orizzontale degli anni ’80, vicino ai laboratori del Gran Sasso (LNGS), sono dal 2015 in registrazione continua (20 sps) sensori di pressione e di conducibilità dell’acqua sotterranea. Durante la sequenza sismica di Amatrice (Mw=6.0, 24/08/2016), i dati di pressione hanno mostrato chiare anomalie circa 5 giorni prima del terremoto; -infine alcuni cambiamenti hanno riguardato altri siti IPODATA (PTRJ, CESX ecc.). ABSTRACT: Following the agreement between INGV and SSI (IPODATA project), seismic equipment was installed in artificial cavities, starting from 2007. Later, in some sites, new geophysical instrumentation was installed in addition, as follows: - in the bunker inside Monte Soratte, near S. Oreste (RM), a monitoring system for very low frequency electromagnetic waves (VLF) has been recently installed together with a radon meter, both for the study of potential seismic precursors; - since 2015, according to a collaboration between INGV, UnivAQ and INFN, in a horizontal borehole drilled (in the ’80s) next to the deep underground laboratories of Gran Sasso (LNGS), pressure and conductivity of groundwater have been recorded by sensors in continuous high sampling (20 sps); during the Amatrice seismic sequence (08/24/2016, Mw=6.0) the pressure data showed clear anomalies about 5 days before the earthquake; - finally, upgrades were carried out in other IPODATA sites (PTRJ, CESX etc.)
    Description: - Societa Speleologia Italiana - Commissione Nazionale Cavita' Artificiali - INGV - Universita' degli studi di Palermo, Dipartimento di Scienze della Terra e del Mare (DiSTeM) - Federazione Speleologica Regionale Siciliana (FSRS) - HYPOGEA - SIGEA (Societa' Italiana di Geologia Ambientale)
    Description: Published
    Description: 207-214
    Description: 1IT. Reti di monitoraggio e sorveglianza
    Description: N/A or not JCR
    Keywords: Cavita' artificiali ; stazione sismica ; precursori sismici / seismic precursors ; VLF band ; radon ; ipogei ; rumore sismico / seismic noise ; artificial cavities ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Publication Date: 2019-12-13
    Description: We performed continuous recordings (May 2015 - January 2017) of hydraulic pressure and electrical conductivity of groundwater in the 190 m-long horizontal S13 borehole drilled next to the deep underground laboratories of Gran Sasso (LNGS-INFN), located in the core of the Gran Sasso carbonate aquifer (central Italy) at a distance of about 39 km south-eastward from the 24 August 2016 Amatrice earthquake (6.0 Mw) epicenter. Using a 3-channel, 24-bit ADC we achieved a sampling rate of groundwater physical properties up to 50 Hz for each channel. We focused on the analysis of data recorded before, during and after the Amatrice earthquake, describing and discussing in detail the evidence for significant hydraulic pressure and electrical conductivity anomalies recorded before the main shock. We identified unambiguous signals in the hydraulic pressure data starting on 19 August, i.e. five days before the 24 August mainshock. A more careful analysis allowed us to detect the inception of a weak change up to 40 days before the Amatrice earthquake and a significant variation in the electrical conductivity data about 60 days before. The data revealed highly dynamic aquifer behaviour associated with the uprising of geogas probably related to the preparation stage of the Amatrice earthquake.
    Description: Published
    Description: id 15982
    Description: 7T. Variazioni delle caratteristiche crostali e precursori sismici
    Description: JCR Journal
    Keywords: earthquake, precursors, hydrology, hydrogeology, Gran Sasso, Anomalies, groundwater, Amatrice eartquake ; 04.06. Seismology ; 03.02. Hydrology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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