SEG-Y Integrated Multichannel Seismic Profiler Dataset from the Southeastern Apulia Continental Margin (Otranto Channel, Southern Adriatic Sea)
Description
This dataset presents integrated geophysical data acquired along the southeastern Apulia continental margin (Otranto Channel, southern Adriatic Sea) during the OCSS15 (2015) and SISOC (2010) geophysical surveys conducted by the Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS, Trieste, Italy). This Otranto Channel dataset (OC) include multichannel seismic (MCS) lines at different resolutions, which provide imaging of the subsurface architecture and help identify structural, stratigraphic, and sedimentary features such as the carbonatic platform, fault systems, gas seepages, submarine canyons, and related geohazards (e.g. mass-transport deposits, debris flows, and turbidity currents) (Del Ben et al., 2026; Caradonna et al., 2026; Geletti et al., 2026). The MS-29 profile acquired in 1971 by the OGS as part of the Mediterranean Sea (MS) project and reprocessed in modern mode by Brancatelli et al. (2022), that produces a Pre-Stack Depth Migrated (PSDM) section is added to this OC dataset. The OCSS15 dataset was acquired by the R/V OGS Explora using a short 300 m digital streamer and a Mini GI gun (approximately 1 L total volume), providing a good balance between vertical resolution and penetration depth, and reaching the Messinian and Carbonate Platform reflectors. The SISOC dataset, collected in 2010, by the R/V OGS Explora too, with a 1500 m digital streamer and dual GI-gun source (about 11 L total volume), was initially designed for oceanographic purposes to characterise water masses in the Otranto Channel and southern Adriatic Sea. However, the inclusion of the sub-seafloor reflections until 8 s of recording allows for geological and structural interpretation through goal processing. The processing of the seismic lines using Echos and GeoDepth from Emerson Paradigm Holding LLC seismic® software at the SEISLAB laboratory of OGS aimed to attenuate short- and long-period multiples, preserve relative amplitude, increase the signal-to-noise ratio, and improve seismic imaging through the Pre-Stack Time and Depth Migrated (PSTM and PSDM) section. The integrated OC dataset, available in SEGY format, includes processed profiles. The coordinates are stored as UTM Zone 34 easting and northing values in headers 73 and 77.
Files
Steps to reproduce
1. Import of SEGY data All seismic profiles were imported into Echos and GeoDepth (Emerson Paradigm Holding LLC) at the SEISLAB laboratory of OGS, ensuring correct geometry assignment and trace header verification. 2. Pre-processing Initial processing steps included trace editing, noise removal, and spherical divergence correction. 3. Multiple attenuation A workflow tailored for each seismic line was applied to attenuate short- and long-period multiples using predictive deconvolution and surface-related multiple suppression techniques. 4. Amplitude preservation and filtering True-amplitude processing was adopted to preserve relative amplitudes. Band-pass filters and f–k filtering were applied to enhance the signal-to-noise ratio. 5. Velocity analysis and NMO correction Velocity functions were derived from pre-stack analyses. These were used to perform NMO correction and improve reflector continuity. 6. Stacking and post-stack enhancement CMP stacking was followed by post-stack processing steps, including residual multiple attenuation, phase correction, and time-variant filtering to refine seismic imaging. 7. Final seismic sections The final migrated and unmigrated post-stack sections were exported for interpretation. The complete processing workflow and parameter details are described in: Geletti, R., Brancatelli, G., Forlin, E., Bertone, N., Del Ben, A., Integrated Multichannel Seismic Profiler Dataset from the Southeastern Apulia Continental Margin (Otranto Channel, Southern Adriatic Sea): Insights into Fault-Controlled Gas Seeps and Geo-Hazards, Data in Brief (2026), DOI: 10.1016/j.dib.2026.112832.
Institutions
- Istituto Nazionale di Oceanografia e Geofisica SperimentaleFriuli-Venezia Giulia, Sgonico