This 2D multi-channel seismic dataset was acquired during SONNE cruise SO252 offshore Ritter Island, Papua New Guinea in November/December 2016. The dataset contains 680 km of normal-moveout-corrected and stacked vertical seismic profiles. Aim of the seismic experiment was to map and image the deposit of the 1888 Ritter Island Sector Collapse. The data was collected with a 250 m-long (160 channels) streamer system with a group spacing of 1.56 m. The system consisted of twenty 12.5 m-long active sections, a 25 m-long vibro-stretch section and 60 m-long tow cable. As seismic source, two GI airguns, shot in harmonic mode (105/105 cubic inch) were used. The data were processed with a 10, 45, 250, 400 Hz bandpass filter and a normal moveout correction (constant velocity: 1495 m/s). Detailed information on the data acquisition can be found in the SO252 cruise report (https://doi.org/10.3289/CR_SO252).