Multidisciplinary Oceanic Information SysTem (MOIST) INGV Integrated Systems for Marine Environmental Infrastructures (SIIAM) paolo.favali@ingv.it 1 0 999999 MARMARA-DM - Seismometer 2009-10-05T00:00:00+00:00 2010-03-15T23:59:59+00:00 29.398833,40.729087,-166.2 <p><b>Web page:</b> <a href='http://www.moist.it/sites/marmara_sea/8/MARMARADM/seismometer/34'>MOIST dataset metadata</a> <p><b>Area:</b> Marmara Sea</p> <p><b>Instrument:</b> Guralp CMG-40T 3 component broadband seismometer (30 s-50 Hz)</p> <p><b>Period:</b> October 05, 2009 - March 15, 2010</p> <p><b>Abstract:</b> This digital database comprises seismological data recorded continuously during the MARMARA-DM 1 project by a 3 component broadband seismometer. The sensor was installed on a GEOSTAR-class deep-sea multidisciplinary observatory, deployed in the Marmara Sea at a depth of 167 m. The seismometer is installed in a dedicated vessel integrated in a separate structure connected to the observatory via a special mechanical release. To guarantee a good coupling with the sea bottom, the structure is disconnected just after the observatory touch-down and kept linked to the frame by a slack rope (Favali et al., 2006). The sensor was connected to a 24 bit digitizer, and its time reference came from an external rubidium clock connected to the digitizer.</p> <p><b>Purpose:</b> The major scientific goal of the SN-4 experiment is to contribute to the knowledge on the relationship between gas seepage and seismic signals. To observe a large variety of seismic signals we use a broadband seismometer. The deployment site is on the sea prosecution of the active North Anatolian fault,which has been the source of many destructive earthquakes, and presents a continuous seismic activity and methane degassing.</p> <p><b>Quality of data:</b> </p>