SM6-P0089
ARCHIVING SEISMIC R/WAR DATA from ITALY
and SURROUNDING SEAS
(1)
Maistrello ,
(1)
Musacchio
(2)
Marcocci
M.
G.
([email protected]), and C.
(1)Sezione di Milano, INGV, Italy; (2) Centro Nazionale Terremoti, INGV, Italy
Example of obs data-1979
E
T-X/8 (sec)
W
Offset (km)
Thyrreanian Sea 1979. Vertical component record-section. The data are displayed in common
shot gather, normalized to maximum amplitude, bandpass filtered 1-20 Hz and time reduced
to 8 km/s [ Nicolich, 1981].
Example of DSS data-1986
S
N
OBS and small off-shore shots
T-X/6 (sec)
Large on/off-shore shots
Land seismic lines
Airgun lines and land recordings
Example of high-resolution 3-components data-1994
SE
Offset (km)
NW
SE
NW
SE
NW
EGT-Southern segment. Vertical component record-section. The data are
displayed in common shot gather, normalized to maximum amplitude, bandpass
filetered 1-15 Hz and time reduced to 6 km/s.
Deep seismic Refraction and Wide-Angle-Reflection (R/WAR) data is information of primary interest for
the understanding of Lithosphere formation and evolution. In the past two decades seismic velocity
models, resulting from several deep controlled source seismic programs, have led to the understanding
of the architecture of the lithosphere of relevant tectonic areas. It is getting more and more important
archive the seismic data on ready-to-use platforms for further modeling, large syntheses and planning
of future new projects.
Today, seismic data are commonly digitally recorded and therefore easily archived and stored with a
given format. However, paper records or analog magnetic tapes, produced in early days of controlled
source seismology programs, are valuable data that might be lost if a proper digitization and archiving
process is not applied. ReWARD (Refraction Wide Angle Reflection Database) aims to assemble all
the deep seismic R/WAR data collected over Italy and surrounding seas (23.000 km), archive them and
make them available to the scientific community.
CROP-MII land recording. 3 component NMO corrected record-sections. The data are displayed in
common receiver gather, normalized to maximum amplitude and bandpass filetered 2-15 Hz. a, b, c are
raw data; d, e, f are polarization filtered data [de Franco and Musacchio, 2002]. (VNMO= 6.2 and 3.5 km/s
for P- and S-waves, respectively)
Analog seismic records, mostly single component, collected before 1994 are 10% of the whole dataset
and consist of about 200 profiles (partially reversed) for about 20.000 km of total length data. Some of
these profiles were never modeled using the modern 2D ray-tracing techniques. They image the
lithosphere at great depths, although with a low spatial resolution (about 21.000 waveforms). The
remaining 90% of the data cover only 3.000 km length with about 350.000 waveforms. They are 3component, high-resolution R/WAR digital waveforms generated by air-gun shooting and acquired onshore Italy. For each study area, digital (or digitized) waveforms will be stored with a common format.
Additional information built-in the archive will be topographic and geologic maps, published seismic
cross-sections and references. The archive will be published on our web-page from which the user
may retrieve on-line the built-in information and download the data upon request.
REFERENCES
de Franco R., Musacchio G., 2002. “Polarization Filter with Singular Value Decomposition”. Geophysics, 2002.
Ferrari R., Maistrello M., 1998. “L'esplorazione sismica profonda in Italia: dati Deep Seismic Soundings in rete!”. In: Bollettino CILEA n. 63 (1998)
Ferrari R., Maistrello M., 2000. "Deep Seismic Soundings: il progetto continua”. In: Bollettino CILEA, n. 74 (2000).
Gaudiosi G., Guerra I., Luzio D., Milano G., Musacchio G., 2000. “Struttura crostale del Tirreno Sud-orientale”. XIX CNR-GNGTS Meeting, Rome, Nov. 2000.
Gasparini P. and Tomoves Group, 1998. “Looking inside Mt. Vesuvius”. In: EOS, n. 79, 229-232.
Gruppo ‘Sea-Land’ Crop-Mare II, 1997. “Wide angle reflection Sea-land CROP-Mare II & LISA Project – Section Atlas”. De Franco R., Caielli G., Corsi A. Editors, Milan, CNR-IRRS, 1997.
Maistrello M., 1996. “Menu_hp: una procedura unificata per la digitalizzazione, elaborazione, archiviazione, trasmissione di segnali sismici analogici, in ambiente Basic-Hp”. Technical report CNR-IRRS 1996; 68 pp.
Morelli C., 2000. “Metodi per una maggiore conoscenza della Crosta terrestre”. In: CNR: Ricerca & futuro, 19, 73-84.
Maistrello M., Corsi A., 2001. “DOL-2000: l’archivio Web delle registrazioni sismiche a rifrazione profonda”. Technical Report INGV, Milan, 2001; 17 pp.
Nicolich R., 1981. “Il profilo Latina-Pescara e le registrazioni mediante OBS nel Mar Tirreno”. I° CNR-GNGTS Meeting, Rome, Nov.1981.
Slejko D., 2001. “Metodi e prospettive per una maggiore conoscenza della crosta terrestre” (Dossier). In: Bollettino CNR Ricerca & Futuro, n.19 (2001).
The DATABASE
Relation Entity
(a standard flow-chart in DB programming)
a self-consistent Entity
possible relations between Entities
Entity legend










EXPERIMENT
PROFILE
BANG
BANG_PLACE
STATION
SENSOR
ACQUISITOR
BIBLIO
IMAGE
WAVEFORM
Relations between entities:
 
'many to many'
(used for the 'Profile to Bang' relation, using 'Rel_put' table)

survey description
seismic lines
shooting parameters
shot-point information
recording site information
sensor(s) properties
data-logger(s) properties
references
bitmaps library of the project
header information (at the moment real data are stored on disk)

'one to many'
(in the DB, the 'Foreign-Key' method was used)
Acknowledgements
Here listed are all the institutions who participated to data collection. They kindly
provided the data for this database. We apologize for possible oversights.
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Istituto di Geofisica Applicata, Politecnico, Milano
Istituto di Geofisica Mineraria, UNI-Palermo
Istituto di Geologia, UNI-Catania
Istituto di Geofisica, UNI-Cosenza
Istituto di Geofisica, UNI-Lecce
Istituto di Geofisica, UNI-Genova
Istituto di Geofisica Applicata e Miniere, UNI-Trieste
Osservatorio Geofisico Sperimentale, Trieste
Istituto per la Geofisica della Litosfera (then IRRS) - CNR, Milano
Istituto Internazionale di Vulcanologia, CNR, Catania
Osservatorio Vesuviano, Napoli
Osservatorio di M.te Porzio Catone, ING, Roma
Bundesanstalt für Bodenforschung, Hannover
Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover
Institut für Angewandte Geophysik, UNI-München
Institut für Meteologie und Geophysik, FU-Berlin
Seismologisches Zentralobservatorium, Erlangen
Institut für die Physik des Erdkorpers, UNI-Hamburg
Institut für Geophysik, UNI-Hannover
Institut für Geophysik, UNI-Kiel
Institut für Geophysik, UNI-Karlsruhe
Institut für Geophysik, UNI-Stuttgart
Ecole Normale Superiéure, Paris
Institut de Physique du Globe, Paris
Institut de Physique du Globe, Strasbourg
Bureau de Reserches Géologiques et Minières, Orleans
Institute of Geophysics, ETH - Hönggeberg - Zürich
Instituto Geografico Nacional - Madrid
Instituto ‘J.Almera’ – C.S.I.S., C. - Barcelona
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