Seismic Data from MSM21/4 to Knipovich Ridge on the western Svalbard margin ...

• Main Authors: Dumke, Ines, Burwicz, Ewa, Berndt, Christian, Klaeschen, Dirk, Feseker, Tomas, Geissler, Wolfram H, Sarkar, Sudipta
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Date/Time of event 2; Latitude of event 2; Longitude of event 2; File name; File size; Uniform resource locator/link to sgy data file; Comment; Seismic reflection profile; MSM21/4; Maria S. Merian; Knipovich Ridge; Svalbard; Svalbard margin
• Online Access: https://dx.doi.org/10.1594/pangaea.847497; https://doi.pangaea.de/10.1594/PANGAEA.847497

The seismic data were acquired north of the Knipovich Ridge on the western Svalbard margin during cruise MSM21/4. They were recorded using a Geometrics GeoEel streamer of either 120 channels (profiles p100-p208) or 88 channels (profiles p300-p805) with a group spacing of 1.56 m and a sampling rate of 2 kHz. A GI-Gun (2×1.7 l) with a main frequency of ~150 Hz was used as a source and operated at a shot interval of 6-8 s.Processing of profiles p100-p208 and p600-p805: Positions for each channel were calculated by backtracking along the profiles from the GI-Gun GPS positions. The shot gathers were analyzed for abnormal amplitudes below the seafloor reflection by comparing neighboring traces in different frequency bands within sliding time windows. To suppress surface-generated water noise, a tau-p filter was applied in the shot gather domain. Common mid-point (CMP) profiles were then generated through crooked-line binning with a CMP spacing of 1.5625 m. A zero-phase band-pass filter with corner frequencies of ... : Supplement to: Dumke, Ines; Burwicz, Ewa; Berndt, Christian; Klaeschen, Dirk; Feseker, Tomas; Geissler, Wolfram H; Sarkar, Sudipta (2016): Gas hydrate distribution and hydrocarbon maturation north of the Knipovich Ridge, western Svalbard margin. Journal of Geophysical Research: Solid Earth, 121(3), 1405-1424 ...