{"ob_id":35039,"uuid":"5b0d2588954e404ab03e8f439d48a8d3","title":"Multi-frequency, three-dimensional, four-component ocean bottom seismometer dataset acquired from an active fluid flow structure: Scanner Pockmark, North Sea.","abstract":"A three-dimensional wide-angle active source seismic dataset was acquired during RRS James Cook cruise JC152 (August - September 2017), around the Scanner Pockmark Complex in the North Sea. Data were recorded on 25 four-component ocean bottom seismometers, recording at a sampling rate of 4 kHz. Four different seismic sources were used: \r\n\r\n1) a 700 ci (100, 200 and 400 ci) Bolt airgun array towed at 10-12 m below sea surface and fired at 10 s intervals; \r\n2) a 420 ci (2 x 105/105 ci) GI airgun array, towed at 2 m depth below sea surface and fired at 8 s intervals; \r\n3) a Squid sparker (1750 or 2000 J), towed at the sea surface and triggered at 2 s intervals; and, \r\n4) a Duraspark sparker (2000 J), towed at the sea surface and triggered at 2 s intervals. \r\n\r\nThis dataset complements Bayrakci et al. (2021; https://doi.org/10.1594/PANGAEA.932200) and updates instrument and shot corrections to fit a single, unique set of instrument positions, generated using a grid search algorithm. \r\n\r\nData are provided in standard SEG-Y format. The shot line geometry corrections were performed following the method described in the accompanying document CHIMNEY_OBS_corrections_summary.pdf. All location information is also present in the positioning directory. The data were acquired as part of the 'Characterization of major overburden leakage pathways above sub-seafloor CO2 storage reservoirs in the North Sea' (CHIMNEY) project, funded by the Natural Environment Research Council (NERC) under grant reference NE/N016130/1.","keywords":"seismic reflection, ocean bottom seismograph, active source seismology, passive source seismology, fluid flow pathways","publicationState":"published","dataPublishedTime":"2022-04-27T11:36:51","doiPublishedTime":null,"updateFrequency":"notPlanned","status":"completed","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/35040/?format=json","dataPath":"/bodc/USO220011/CHIMNEY_OBS_active","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":868369944141,"numberOfFiles":924,"fileFormat":"Data are SEGY formatted data files"},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/10226/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/3409/?format=json","nonGeographicFlag":false,"phenomena":[],"dataLineage":"Three-dimensional wide-angle active source seismic data were acquired during NERC cruise JC152 from August-September 2017 in the North Sea. The raw data were processed by the science party and provided to the British Oceanographic Data Centre for long-term archive. Data were subsequently archived and catalogued at CEDA.","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":[],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/37051/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/37081/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/177025/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/170197/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/170196/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/170194/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/170193/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/170192/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/177019/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/170195/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/177020/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/177021/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/177022/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/177023/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/177024/?format=json"],"procedureAcquisition":"https://catalogue.ceda.ac.uk/api/v2/acquisitions/37080/?format=json","procedureCompositeProcess":null,"procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2526/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"public","accessRoles":null,"label":"public: None group","licenceURL":"http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","licenceClassifications":"any"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"}]}