Observation Instance

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{
    "ob_id": 45190,
    "uuid": "d8d9bf82d2764f75b5177dadfdfbc258",
    "title": "Ocean bottom node wide-angle seismic data at the Semenov-1 Hydrothermal Site region of the Mid-Atlantic Ridge during the RRS James Cook cruise JC254 (November 2023)",
    "abstract": "The dataset contains wide-angle seismic data from 6 ocean bottom nodes (OBX-90, GEOSPACE) collected during RRS James Cook cruise JC254 in November 2023. The data were acquired at the Semenov-1 Hydrothermal Field region of the Mid-Atlantic Ridge at 13°30'N, and were shot in two sequences (SEM1 and SEM1B). Two GI-guns were used as seismic sources, each with a total volume of 210 cubic inches (105 cu. inch generator, 105 cu. inch injector chamber). The data were recorded at a sampling rate of 2000 Hz (500 µs), with a shot interval of 8 s at a ship speed of 5 knots, resulting in shot interval of ~20.5 m. The data are provided in raw SEGY format, cut into four components (three geophone channels and one hydrophone channel). The SEGY file has a trace length of 10s and 20000 samples. This dataset was collected with an aim to derive a seismic velocity structure of the SEM-1 seafloor massive sulphide deposit region. The aim was to understand the interplay between tectonic faulting, magmatism, and hydrothermal circulation at the ultramafic-hosted hydrothermal systems along slow-spreading ridges. The data were collected as part of a NERC-funded strategic research project called 'Ultramafic-hosted mineral Resource Assessment (ULTRA)', grant reference NE/S004068/1. The data were processed and interpreted as part of a PhD studentship hosted by the University of Southampton, awarded to Szu-Ying Lai, and funded by Equinor A.S, Norway.",
    "keywords": "",
    "publicationState": "citable",
    "dataPublishedTime": "2025-12-11T09:01:10",
    "doiPublishedTime": "2025-12-11T09:01:10",
    "updateFrequency": "notPlanned",
    "status": "final",
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        "dataPath": "/bodc/deposits02/uso251016",
        "oldDataPath": [],
        "storageLocation": "internal",
        "storageStatus": "online",
        "volume": 2477414039,
        "numberOfFiles": 51,
        "fileFormat": ".segy; .jpg; .txt"
    },
    "timePeriod": "https://api.catalogue.ceda.ac.uk/api/v2/times/12877/?format=api",
    "geographicExtent": "https://api.catalogue.ceda.ac.uk/api/v2/bboxes/4965/?format=api",
    "nonGeographicFlag": false,
    "phenomena": [],
    "dataLineage": "The data are archived on the British Oceanographic Data Centre (BODC)'s space at the Centre for Environmental Data Analysis (CEDA) and assigned a DOI. No quality control procedures were applied by BODC.",
    "removedDataTime": null,
    "removedDataReason": "",
    "language": "English",
    "identifier_set": [
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    "projects": [],
    "observationcollection_set": [],
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    "procedureCompositeProcess": null,
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    "permissions": [],
    "discoveryKeywords": []
}