Publication Date:
2017-04-04
Description:
In May 2007, within the monitoring activities carried out in cooperation with the Italian National Civil Protection
Department (DPC), and within the European project NERIES (activity NA6), the Gibilmanna OBS
Lab of the INGV has deployed three Broad Band Ocean Bottom Seismometers (BBOBS) in the southern
Ionian Sea at 3500-4000 meters of depth. The BBOBS deployed were equipped with a Nanometrics
Trillium 120P seismometer and a Cox-Webb 500s-2 Hz Differential Pressure Gauge (DPG). A 21 bits
four channel digitizer (SEND Geolon MLS) recorded data at 100 sps. During the nine months of the experiment,
the OBS’s array recorded more than 400 events: about 90 are teleseismic events, more than
200 are regional events also recorded by the seismic networks onshore, finally more than 100 events
were not recorded by any seismic networks on land. We used both the regional and teleseismic events
recorded by seismometer and DPG to construct a simple velocity model for the Ionian crust. Teleseismic
receiver function were computed from high s/n teleseismic records and dispersion curves were extracted for Rayleigh wave recorded. We inverted both the receiver function and Rayleigh dispersion
curves data-set to constrain a 1D S-velocity model for the Ionian crust. Moreover a minimum 1‐D velocity
P‐wave model is estimated by inversion of the first P-wave arrivals time of the regional events.
Description:
Published
Description:
Crete, Greece
Description:
2.5. Laboratorio per lo sviluppo di sistemi di rilevamento sottomarini
Description:
open
Keywords:
BBOBS
;
OBS
;
Ionian Sea
;
Moho
;
Receiver function
;
P-wave model
;
S-wave model
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
Poster session
