HR: 1340h
AN: S13C-1075    [Abstracts]
TI: High Quality Seismological Recordings From the SN-1 Deep Seafloor Observatory at the Base of Mt. Etna
AU: * Monna, S
EM: monna@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, Rome, 00198 Italy
AU: Frugoni, F
EM: frugoni@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, Rome, 00198 Italy
AU: Montuori, C
EM: montuori@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, Rome, 00198 Italy
AU: Beranzoli, L
EM: beranzoli@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, Rome, 00198 Italy
AU: Favali, P
EM: paolofa@ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, Rome, 00198 Italy
AB: We show results from the SN-1 seafloor multidisciplinary observatory 4 month long experiment, off-shore Eastern Sicily (Italy) at 2105 b.s.l.. SN-1 3 component broadband seismometer shows background noise levels above 0.1 Hz, similar to the ones found at a nearby ground station. We find that tilt of the sensor induced by sea currents is a noise source below 0.01 Hz. Seismic noise levels above 0.01 Hz are strongly characterised by Etna volcanic activity. In spite of such intense noise sources, SN-1 could record a large amount of events on local, regional and global scale. The quality of seismic recordings confirms a valid installation procedure and ground coupling of the 3 component broadband sensor, suggesting that SN-1 can be proposed as permanent observatory in this high seismic and volcanic hazard area.
DE: 7294 Instruments and techniques
DE: 7200 SEISMOLOGY
DE: 3000 MARINE GEOLOGY AND GEOPHYSICS
SC: Seismology [S]
MN: 2004 AGU Fall Meeting