HR: 1340h
AN: T53B-0494    [Abstracts]
TI: The CESIS project: a new satellite seismic and CGPS network in Southern Italy to study plate boundary deformation in the Central Mediterranean
AU: * Working Group, C
EM: avallone@ingv.it
AF: Istituto Nazionale Geofisica Vulcanologia, Via Vigna Murata 605, Rome, 00143 Italy
AB: The collision between Africa and Eurasia is associated with a complex pattern of deformation within the plate boundary zone, with subduction of oceanic fragments, crustal extension along formerly contracting orogenic belts and back-arc spreading in Tertiary basins. First-order scientific problems regarding the existence of rigid blocks within the plate boundary, the present-day activity of the Calabrian slab and the regional crust and upper mantle structures are still awaiting for a better understanding. Established in 2002 by the INGV (Istituto Nazionale di Geofisica e Vulcanologia) the CESIS project is deploying a permanent, integrated and real time monitoring system of 60 co-located permanent GPS and broad band seismometers in Southern Italy. The network is connected to the acquisition centre (located in Rome and duplicated in Grottaminarda) by a satellite system (VSAT). 50 seismic stations will be equipped with broad-band (0.033-40 Hz) seismometers and accelerometers, while 10 will be equipped with very broad-band seismometers. All the sites will be equipped with 1 Hz CGPS receivers. Average station distance is planned to be about 30 km, with closer spacing near active faults. The research activity resulting from the data coming from the CESIS network will thus explore the full range of temporal and spatial frequencies that characterize plate boundary deformation, allowing a large range of scientific problems, ranging from earthquake source studies to regional plate kinematics, to be tackled. Some of the most intriguing targets concern (a) the study of present activity of the Calabrian slab and its associated crustal deformation, (b) the southern boundary of the Adriatic block (a rigid microplate whose existence have been proposed on the basis of seismicity distribution, earthquake slip-vectors, and space geodesy), and (c) the monitoring of strain build-up along seismogenic faults. We present (a) the technical description of seismic and geodetic data acquisition, (b) the GPS and seismic stations monumentation, (c) the planned and existing site distribution, (d) the flow and archiving of seismic and geodetic data, and (e) first results of data analysis.
DE: 7230 Seismicity and seismotectonics
DE: 7218 Lithosphere and upper mantle
DE: 1206 Crustal movements--interplate (8155)
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting