Seismic profile Marsibal36 located in the proximal continental margin of the Spanish Alboran Sea

The seismic profile was collected using airgunguns located at a depth of 3.5 m and with a shot frequency of 8 s. The penetration of the acoustic signal was 2–3 s two-way travel time, and the resolution was tens of metres (i.e., a middle resolution of 10/15 m). The streamer was a SIG streamer with an active section of 150 m long, comprising three independent channels with 40 hydrophones each. A GeoAcoustics Sonar Enhancement System (SES) was used for the acquisition and processing of the seismic signals from the streamer. Sampling frequency was 1 ms.