SEG-Y Integrated Multichannel Seismic Profiler Dataset from the Southeastern Apulia Continental Margin (Otranto Channel, Southern Adriatic Sea)

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.