Citation:
Citation_Information:
Originator: James E. Conrad
Originator: Jane A. Rudebusch
Publication_Date: 20230808
Title:
Methane seep locations derived from water-column acoustic backscatter data collected along Cascadia Margin offshore Oregon and Northern California, 2018-2021
Geospatial_Data_Presentation_Form: point shapefile
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9TW2X7Y
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested Citation: Conrad, J.E., and Rudebusch, J.A., 2023, Methane seep locations derived from water-column acoustic backscatter data collected along Cascadia margin offshore Oregon and Northern California, 2018-2021: USGS data release,
https://doi.org/10.5066/P9TW2X7Y.
Description:
Abstract:
This dataset contains the locations of 902 methane cold seeps that were detected in acoustic water-column backscatter collected by the U.S. Geological Survey between 2018 to 2021. Rising bubbles emitting from methane seeps on the seafloor can be detected acoustically with multibeam echo sounding sonar used to collected seafloor bathymetric mapping data, which the USGS and NOAA have cooperatively collected along the Cascadia Margin offshore of northern California and Oregon for several years.
Purpose:
These data were collected from a multibeam echosounder survey as part of the broader effort by the USGS Marine Geohazards Program to compile high-resolution bathymetric maps of the Cascadia Margin. These data are used to characterize the seafloor geomorphology to help understand geologic hazards posed by the megathrust fault and other tectonic features of the Cascadia subduction zone. Multibeam echo sounding sonar used to map the depth and topography of the seafloor also captures anomalies in the water column above the seafloor, such as rising fluid bubbles that produce strong acoustic reflectance in the imaging sonar. Globally, vast reserves of methane are stored beneath the seafloor that can seep up into the water column and can be detected with multi-beam echo sounder. The seeps in this dataset were detected in the water-column acoustic backscatter data and recorded for the purposes of understanding patterns in the distribution of fluid seepage along the margin.
Supplemental_Information:
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20180731
Ending_Date: 20211109
Currentness_Reference: Ground conditions at time data were collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: none
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -125.065269
East_Bounding_Coordinate: -124.304200
North_Bounding_Coordinate: 46.286529
South_Bounding_Coordinate: 40.579799
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:22690c33-9099-426b-ad32-3cc5b560f028
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: distributions
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: multibeam sonar
Theme_Keyword: geospatial datasets
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: oil and gas seep
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: CMHRP
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword: PCMSC
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of California
Place_Keyword: State of Oregon
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Cascadia Margin
Access_Constraints: None
Use_Constraints:
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Person: PCMSC Science Data Coordinator
Contact_Address:
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: USGS_Cascadia_Seeps_2023.jpg
Browse_Graphic_File_Description:
A map of the Cascadia Margin showing the point locations of the seep flares contained in this dataset.
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
This dataset was produced using QPS FMMidwater v 7.7.9 on an Apple Macbook Pro (2019) with MacOS X Monterey operating system, Microsoft Excel Workbook, and using Esri ArcGIS Pro version 3.0.3 on a Windows 10 computer.
Cross_Reference:
Citation_Information:
Originator: Jane A. Rudebusch
Originator: Nancy G. Prouty
Originator: James E. Conrad
Originator: Janet T. Watt
Originator: Jared W. Kluesner
Originator: Jenna C. Hill
Originator: Nathaniel C. Miller
Originator: Sally J. Watson
Originator: Jess I.T. Hillman
Publication_Date: 2023
Title:
Diving Deeper Into Seep Distribution Along the Cascadia Convergent Margin, USA
Other_Citation_Details:
Rudebusch, J.A., Prouty, N.G., Conrad, J.E., Watt, J.T., Kluesner, J.W., Hill, J.C., Miller, N.C., Watson, S.J., Hillman, J.I.T. 2023. Diving Deeper into Methane Seep Distributions Along the Cascadia Convergent Margin, USA. Frontiers in Earth Science.
Online_Linkage: http://XXXXXX
