Project SEAMSTRESS: DEPAS ocean-bottom seismometer operations on Vestnesa Ridge in 2020-2021 ...

• Main Authors: Plaza-Faverola, Andreia, Domel, Przemyslaw, Bünz, Stefan, Schmidt-Aursch, Mechita, Schlindwein, Vera
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: DEPAS; ocean-bottom seismometer; Passive seismology; Vestnesa Ridge; Event label; Project; Principal investigator; Code; Station label; Date/time start; LATITUDE; LONGITUDE; ELEVATION; Date/time end; Clock skew; Recorder type; Recorder, serial number; Seismometer type; Seismometer, serial number; Seismometer gain; Hydrophone type; Hydrophone, serial number; Hydrophone gain; Hydrophone polarity; Sampling rate; Cruise/expedition; Comment; Binary Object; Ocean bottom seismometer; Centre for Arctic Gas Hydrate, Environment and Climate CAGE; Tectonic stress effects on Arctic methane seepage SEAMSTRESS; Arctic; Knipovich Ridge; Molloy; Arctic Gas Hydrate, Environment and Climate; arctic methane
• Online Access: https://dx.doi.org/10.1594/pangaea.952424; https://doi.pangaea.de/10.1594/PANGAEA.952424

This ocean-bottom seismometer deployment is part of the SEAMSTRESS project examining tectonic stress effects on Arctic methane seepage. The project is led by PI Andreia Plaza-Faverola at the Centre for Arctic Gas Hydrates, University of Tromsö, Norway.A total of 10 ocean bottom seismometers (OBS) were deployed on Vestnesa Ridge, a sediment drift body just north Knipovich Ridge at its intersection with the Molloy Transform fault (cruise CAGE-20-5). The aim of the experiment was to look for stress release along faults that control seepage sites on Vestnesa Ridge. The network consisted of 8 Lobster type broadband OBS from the German Instrument Pool for Amphibian Seismology (DEPAS) and 2 3C geophones provided by the University of Tromsö. Instruments were free-fall deployed and spaced by about 10 km. They recorded continuously at 100 Hz for 11 months between August 2020 and July 2021.Short, intersecting refraction profiles were shot across all OBS stations, such that OBS positions at the seafloor could be ...