EGT-Southern segment. Vertical component record-section.EGT-Southern segment. Vertical component record-section. The data are The data are displayed in common displayed in common shotshot gather, gather, normalized to maximum amplitudenormalized to maximum amplitude, bandpass , bandpass filetered 1-15 Hz and time reduced to 6 km/sfiletered 1-15 Hz and time reduced to 6 km/s. .

Example of DSS data-Example of DSS data-19861986S

T-X

/6 (

sec)

N

Offset (km)

M. Maistrello(1), G. MusacchioMusacchio(1) (gemma@mi.ingv.itgemma@mi.ingv.it), and C. Marcocci(2)

(1)Sezione di Milano, INGV, Italy; (2) Centro Nazionale Terremoti, INGV, Italy

The DATABASEThe DATABASE

Deep seismic Refraction and Wide-Angle-Reflection (R/WAR) data is information of primary interest for 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 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 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 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 archive the seismic data on ready-to-use platforms for further modeling, large syntheses and planning of future new projects. of future new projects.

Today, seismic data are commonly digitally recorded and therefore easily archived and stored with a 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 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 source seismology programs, are valuable data that might be lost if a proper digitization and archiving process is not applied. process is not applied. ReWARD (Refraction Wide Angle Reflection Database) aims to assemble all 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 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. make them available to the scientific community.

Analog seismic records, mostly single component, collected before 1994 are 10% of the whole dataset 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 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 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 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 3-remaining 90% of the data cover only 3.000 km length with about 350.000 waveforms. They are 3-component, high-resolution R/WAR digital waveforms generated by air-gun shooting and acquired on-component, high-resolution R/WAR digital waveforms generated by air-gun shooting and acquired on-shore Italy. For each study area, digital (or digitized) waveforms will be stored with a common format. shore 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 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 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.may retrieve on-line the built-in information and download the data upon request.

ARCHIVING SEISMIC R/WAR DATA from ITALYARCHIVING SEISMIC R/WAR DATA from ITALYand SURROUNDING SEASand SURROUNDING SEAS

REFERENCESREFERENCES

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).

SM6-P0089SM6-P0089

1 Istituto di Geofisica Applicata, Politecnico, Milano I 2 Istituto di Geofisica Mineraria, UNI-Palermo I 3 Istituto di Geologia, UNI-Catania I 4 Istituto di Geofisica, UNI-Cosenza I 5 Istituto di Geofisica, UNI-Lecce I 6 Istituto di Geofisica, UNI-Genova I 7 Istituto di Geofisica Applicata e Miniere, UNI-Trieste I 8 Osservatorio Geofisico Sperimentale, Trieste I 9 Istituto per la Geofisica della Litosfera (then IRRS) - CNR, Milano I

10 Istituto Internazionale di Vulcanologia, CNR, Catania I 11 Osservatorio Vesuviano, Napoli I 12 Osservatorio di M.te Porzio Catone, ING, Roma I 13 Bundesanstalt für Bodenforschung, Hannover I 14 Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover I 15 Institut für Angewandte Geophysik, UNI-München D 16 Institut für Meteologie und Geophysik, FU-Berlin D 17 Seismologisches Zentralobservatorium, Erlangen D 18 Institut für die Physik des Erdkorpers, UNI-Hamburg D 19 Institut für Geophysik, UNI-Hannover D 20 Institut für Geophysik, UNI-Kiel D 21 Institut für Geophysik, UNI-Karlsruhe D 22 Institut für Geophysik, UNI-Stuttgart D 23 Ecole Normale Superiéure, Paris F 24 Institut de Physique du Globe, Paris F 25 Institut de Physique du Globe, Strasbourg F 26 Bureau de Reserches Géologiques et Minières, Orleans F 27 Institute of Geophysics, ETH - Hönggeberg - Zürich CH 28 Instituto Geografico Nacional - Madrid E 29 Instituto ‘J.Almera’ – C.S.I.S., C. - Barcelona E

AAccknowledgementsknowledgements

Here listed are all the institutions who participated to data collection. They kindly provided the data for this database. We apologize for possible oversights.

CROP-MII land recording. 3 component NMO corrected record-sections.CROP-MII land recording. 3 component NMO corrected record-sections. The data are displayed in The data are displayed in common receiver gather,common receiver gather, normalized to maximum amplitudenormalized to maximum amplitude and bandpass filetered 2-15 Hz and bandpass filetered 2-15 Hz. a, b, c are . a, b, c are raw data; d, e, f are raw data; d, e, f are polarizationpolarization filtered data filtered data [ [de Franco and Musacchio, 2002de Franco and Musacchio, 2002]. ]. (VNMO= 6.2 and 3.5 km/s (VNMO= 6.2 and 3.5 km/s for P- and S-waves, respectively) for P- and S-waves, respectively)

Example of high-resolution 3-components data-Example of high-resolution 3-components data-19941994

SE NW SE NW SE NW

Large on/off-shore shots

Land seismic lines

Airgun lines and land recordings

OBS and small off-shore shots

Thyrreanian Sea 1979. Vertical component record-section.Thyrreanian Sea 1979. Vertical component record-section. The data are displayed in The data are displayed in common common shotshot gather, gather, normalized to maximum amplitudenormalized to maximum amplitude, bandpass filtered 1-20 Hz and time , bandpass filtered 1-20 Hz and time reduced to 8 km/sreduced to 8 km/s [ [ Nicolich, 1981Nicolich, 1981].].

Example of obs data-Example of obs data-19791979

W E

T-X

/8 (

sec)

Offset (km)

Relation EntityRelation Entity(a standard flow-chart in DB programming)

 

a self-consistent Entity  possible relations between Entities

Entity legend 

EXPERIMENTEXPERIMENT survey descriptionsurvey descriptionPROFILEPROFILE seismic linesseismic linesBANGBANG shooting parametersshooting parametersBANG_PLACEBANG_PLACE shot-point information shot-point information STATIONSTATION recording site informationrecording site informationSENSORSENSOR sensor(s) propertiessensor(s) propertiesACQUISITORACQUISITOR data-logger(s) propertiesdata-logger(s) propertiesBIBLIOBIBLIO referencesreferencesIMAGEIMAGE bitmaps library of the projectbitmaps library of the projectWAVEFORMWAVEFORM header information (header information (at the moment real data are stored on disk)at the moment real data are stored on disk)

Relations between entities: 

(used for the 'Profile to Bang' relation, using 'Rel_put' table) (in the DB, the 'Foreign-Key' method was used)

‚”'one to many''one to many'””'many to many''many to many'