Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • M3 Water Column Sonar Data Collected During NOAA-MC20-Survey

    Metadata Updated: November 10, 2022

    In 2018, NOAA and its partners conducted a comprehensive assessment of the MC20 site. This data compilation contains ship-based surface echosounder surveys characterizing the spatial structure of the plumes. Data were collected using three frequency Simrad EK80 splibeam echosounders and Kongsberg M3 multibeam echosounder from a ship. Inspection of the acoustic backscatter indicates multiple plume components emitting from separate origins on the seafloor within an erosional pit at the northwest corner of the downed jacket. Broad-band acoustic frequency backscatter intensity suggests indicators of oil and gas plumes within the water column. Closer inspection using ROV-integrated three frequency Simrad EK80 splitbeam echosounders and Kongsberg M3 multibeam sonars confirm the presence of at least four plume sources emitting from the seafloor with acoustic signatures indicating oil separating from gas as well as oil and gas mixtures. In subsequent chapters, the separation of oil from gas from each of the seep sources was verified using in situ optical and direct capture methods. The assessment provides further evidence of an oil and gas leak that has likely occurred since the original toppling of the MC20 platform.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 14, 2021
    Metadata Created Date November 10, 2022
    Metadata Updated Date November 10, 2022
    Reference Date(s) September 1, 2018 (creation), July 22, 2019 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NGDC MGG Sonar Water Column

    Other Data Resources

    Additional Metadata

    Resource Type Series
    Metadata Date September 14, 2021
    Metadata Created Date November 10, 2022
    Metadata Updated Date November 10, 2022
    Reference Date(s) September 1, 2018 (creation), July 22, 2019 (publication)
    Responsible Party NOAA National Centers for Environmental Information (Point of Contact)
    Contact Email
    Guid gov.noaa.ncei:NOAA-MC20-Survey_M3
    Access Constraints Cite as: Bureau of Safety and Environmental Enforcement(BSEE). 2021. M3 Water Column Sonar Data Collected During NOAA-MC20-Survey. NOAA National Centers for Environmental Information. https://doi.org/10.25921/3da5-3y10 [access date], Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose., Resource may not be available for up to one year after initial collection.
    Bbox East Long -88.93873
    Bbox North Lat 28.94878
    Bbox South Lat 28.93249
    Bbox West Long -88.97506
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 774c95a1-6e49-4f0e-bc09-5ccd98cf6ff5
    Harvest Source Id ab8b0290-e4db-4a00-89f2-4e427c2054b2
    Harvest Source Title NGDC MGG Sonar Water Column
    Licence These data are considered raw and have not been subjected to the NOAA's quality control or quality assurance procedures. They are released for limited public use as preliminary data to be used only with appropriate caution. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty., Not subject to copyright protection within the United States.
    Lineage Uncalibrated
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-88.97506, 28.93249], [-88.93873, 28.93249], [-88.93873, 28.94878], [-88.97506, 28.94878], [-88.97506, 28.93249]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System urn:ogc:def:crs:EPSG::4326
    Spatial Harvester True
    Temporal Extent Begin 2018-09-01T00:00:00
    Temporal Extent End 2018-09-07T11:59:59

    Didn't find what you're looking for? Suggest a dataset here.