GNGTS 2015 - Atti del 34° Convegno Nazionale

GNGTS 2015 S essione 2.2 137 Sites . The characterization of the recording site, from the geographical, geological and geophysical point of view is essential for a correct use and interpretation of the data recorded by that station. The NISBAS database archives all the information needed to describe both the instrumentation and the characterization of the sites that host the stations. Station metadata are displayed within the area Sites of the website. The Station search page (Fig. 1) allows to search sites according to the different criteria: network type (permanent or temporary), network code, station code, station name, geographical location (geographical coordinates, region, province) and other information such as soil type (EC8 code), housing, morphology, etc. The Search operation provides a list of stations matching the request. By selecting a station from the list, one can access to the Station detail page, where the station main characteristics are given and its location is shown on a Google Earth map. Below the station description, the active and/or old instrumentations are listed and a link leads to the Sensor-Channel detail, where details on digitizers and sensors are reported. The whole information about stations is also gathered in a Station Monography , downloadable in pdf printable format. The Station Monography describes all the features and shows, when available, a photo of the site, the geological map, the topographic or regional technical maps, the microtremor H/V spectral ratios curve, the site classifications according to the seismic norms, the EC8 (CEN, 2003) or the NTC-08 (NTC, 2008). Three institutions (the National Institute of Oceanography and Experimental Geophysics - OGS, the Geological Seismic Soil Survey of Emilia-Romagna Region RER, and the Institute of Methodologies for Environmental Research (IMAA) of the National Council of Research (CNR) CNR-IMAA) cooperated in the installation and maintenance of the NISBAS stations. The stations included within NISBAS (and listed in Tab. 1) belong to three different networks: the North-East Italy Regional Broad Band Seismic Network NI (Priolo et al. , 2005; Bragato et al. , 2011), the University of Basilicata (UNIBAS) network BA (Attolico et al. , 2010), and the Collalto permanent network EV (Priolo et al., 2015b). The stations are the following: 1. ED01. The station ED01 - Susegana S. Lucia (TV) belongs to the Collalto permanent network EV, which aims at monitoring the natural and the induced seismicity of a gas storage activity in Veneto Region. The station is a 3-channel DM24-Guralp data logger, equipped with a compact seismometer (Guralp CMG-SP1, T=10 s, fmax=100 Hz) installed at 153 m depth. The data are acquired in continuous mode from December 2011, with a sampling rate of 200 Hz. 2. FERB. The station FERB - Casaglia (Ferrara) Borehole, managed by OGS in co-operation with INGV, has been reinstalled following the May 2012 Emilia sequence. It is equipped with a Guralp CMG-3T (360 s) Very Broad Band seismometer (with a CMG-DM24 digitiser) installed at 135 m depth. The data are acquired in continuous mode and the sampling rate is 100 Hz. 3. IMAA. The IMAA - Tito Scalo station is located in the Saint Loja Plain in southern Italy, along the axial zone of Southern Apennines. The station is a 6-channel K2-Kinemetrics data logger, equipped with a surface accelerometer (1g FBA ES-DECK Episensor) and a shallow borehole accelerometer installed at 35-m depth (1g shallow borehole Episensor). The data acquisition started on 28 November 2005. All triggered events were recorded with a sampling rate of 100 Hz. 4. MIRB. The station MIRB - Mirandola Borehole, is located in the epicentral area of the May 2012 Emilia sequence close to the RAN station, which recorded the maximum acceleration (a PGA value of 0.9 g on the vertical component of the 29 May shock). It is equipped with three Sara Force Balance accelerometers SA10, one at the surface, another one at 31 m depth, and the third at 126 m depth, respectively. The sensor at 126 m lies within a rock formation. The data are acquired in continuous mode with a sampling rate of 100 Hz. 5. MSN. The MSN - Marsico Nuovo station is located in the HighAgri Valley, a Quaternary NW-SE trending intermontane basin located in the axial zone of the Southern Apennines