Chirp sub-bottom data collected during USGS field activity 2018-658-FA between Cape Blanco and Cape Mendocino in October of 2018

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Alicia F. Balster-Gee
Originator: Jared W. Kluesner
Originator: Janet T. Watt
Originator: Jenna C. Hill
Originator: Daniel S. Brothers
Originator: Melanie J. Michalak
Originator: Daniel O’Shea
Publication_Date: 20230809
Title:
Chirp sub-bottom data collected during USGS field activity 2018-658-FA between Cape Blanco and Cape Mendocino in October of 2018
Geospatial_Data_Presentation_Form: seismic-reflection data in SEG-Y format
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9MYL7WJ
Publication_Information:
Publication_Place:
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/P9MYL7WJ
Larger_Work_Citation:
Citation_Information:
Originator: Alicia F. Balster-Gee
Originator: Jared W. Kluesner
Originator: Janet T. Watt
Originator: Jenna C. Hill
Originator: Daniel S. Brothers
Originator: Melanie J. Michalak
Originator: Daniel O'Shea
Publication_Date: 2023
Title:
Multichannel sparker and chirp seismic reflection data collected during USGS field activity 2018-658-FA between Cape Blanco and Cape Mendocino in October of 2018
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9MYL7WJ
Publication_Information:
Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested Citation: Balster-Gee, A.F., Kluesner, J.W., Watt, J.T., Hill, J.C., Brothers, D.S., Michalak, M.J., and O’Shea, D., 2023, Multichannel sparker and chirp seismic reflection data collected during USGS field activity 2018-658-FA between Cape Blanco and Cape Mendocino in October of 2018: U.S. Geological Survey data release, https://doi.org/10.5066/P9MYL7WJ.
Description:
Abstract:
This data release contains processed chirp sub-bottom data that were collected aboard Humboldt State University’s R/V Coral Sea in October of 2018 on U.S. Geological Survey cruise 2018-658-FA on the shelf and slope between Cape Blanco, Oregon, and Cape Mendocino, California. MCS data were collected to characterize quaternary deformation and sediment dynamics along the southern Cascadia margin. Chirp sub-bottom data were collected coincident with sparker MCS data.
Purpose:
The USGS collected chirp sub-bottom data and high-resolution sparker MCS profiles in October of 2018 along the southern Cascadia margin and marine forearc between Cape Blanco, Oregon, and Cape Mendocino, California. Primary goals of this survey were to image the offshore portion of the Quaternary active Little Salmon and Mad River fault zones. Other goals were to image the stratigraphy of Trinidad, Sixes, and Rogue canyons. MCS data were collected using a Delta Sparker source and recorded on an 88-channel digital streamer. Chirp sub-bottom data were collected using an Edgetech 512 chirp towfish. These data and information are intended for science researchers, students, policy makers, and general public.
Supplemental_Information:
Additional information about the field activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2018-658-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20181004
Ending_Date: 20181018
Currentness_Reference: ground condition at time data were collected
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -125.38574219
East_Bounding_Coordinate: -123.48388672
North_Bounding_Coordinate: 43.25108812
South_Bounding_Coordinate: 40.14849082
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:937ada5b-0c87-4b89-be7b-b8e29430c178
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: oceans
Theme:
Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Bathymetry and Elevation
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: sub-bottom profiling
Theme_Keyword: geospatial datasets
Theme_Keyword: marine geophysics
Theme:
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seismic reflection profiling
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
Theme_Keyword: sparker
Place:
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of California
Place_Keyword: State of Oregon
Place_Keyword: Crescent City
Place_Keyword: City of Eureka
Place_Keyword: Eel River
Place_Keyword: Cape Blanco
Place:
Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: Eel Canyon
Place_Keyword: Bear Valley
Place_Keyword: Mattole Canyon
Place_Keyword: Trinidad Canyon
Place_Keyword: Eel Canyon
Place_Keyword: Mendocino Ridge
Place_Keyword: Mendocino Escarpment
Place_Keyword: Mendocino Fracture Zone
Place_Keyword: Blanco Fracture Zone
Place_Keyword: Blanco Saddle
Place_Keyword: Gorda Basin
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 of the dataset and in products derived from these data. This information is not intended for navigation purposes.
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: 2018-658-FA.chirp.preview.png
Browse_Graphic_File_Description: Map of 2018-658-FA chirp seismic tracklines.
Browse_Graphic_File_Type: PNG
Data_Set_Credit:
This data collection was a joint effort between the U.S. Geological Survey and Humboldt State University. The authors acknowledge the crew of Humboldt State University’s R/V Coral Sea and all those involved in in survey planning and execution.
Native_Data_Set_Environment: SEG-Y Rev 1
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Identified as best available version
Logical_Consistency_Report:
Multichannel sparker seismic reflection data were collected during USGS field activity 2018-658-FA using an 88-channel Geometrics GeoEel digital hydrophone streamer (1.5625 m and 3.25 m group spacings), a 6.4 kJ Applied Acoustics power supply, and a Delta Sparker sound source. Quality control was conducted during the collection process. Chirp data was collected coincident with sparker MCS data so there is intermittent overprinting of the sparker source on the chirp data. This overprinting causes swell correction artifacts in some locations. Other swell correction artifacts exist at line starts and ends and in locations where the seafloor amplitudes are low.
Completeness_Report:
Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Position data were provided by a Differential Global Postitioning System (DGPS) navigation receiver. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted.
Lineage:
Process_Step:
Process_Description:
The Discover acquisition software (v. 6) output envelope chirp data in SEG-Y format. Sioseis seismic software (https://sioseis.ucsd.edu/) was used to correct for the chirp towfish depth. Data were then swell corrected over a period of 35 traces and the water column was muted 200ms above the seafloor. Processed data were exported to SEG-Y format with standard header byte locations. X and Y navigation points are written to header bytes 81/85 in UTM zone 10N coordinates. SEG-Y data files were compressed into the zip file 2018-658-FA.chirp.segy.zip.
Process_Date: 20200305
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference:
Horizontal X and Y locations for the seismic profile locations are stored in the SEG-Y data trace headers in header bytes 81 and 85.
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: WGS 1984 UTM Zone 10N
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -123.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001
Planar_Distance_Units: Meter
Geodetic_Model:
Horizontal_Datum_Name: D WGS 1984
Ellipsoid_Name: WGS 1984
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257223563
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Local surface
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Navigation and seismic shots with time stamp in standard SEG-Y file format
Entity_and_Attribute_Detail_Citation:
Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - CMGDS
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
Resource_Description:
2018-658-FA.chirp.zip This zip file contains chirp sub-bottom (SEG-Y) data collected during USGS field activity 2018-658-FA. These data are divided up and presented by navigation line, as reflected in the individual file names.
Distribution_Liability:
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SEG-Y
Format_Version_Number: SEG-Y rev 1
Format_Information_Content:
Zip file contains the processed seismic data per navigation line
File_Decompression_Technique:
Winzip, 7-zip, or Winrar are free software that will open .zip files
Transfer_Size: 13200
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.5066/P9MYL7WJ
Access_Instructions:
Data can be downloaded using the Network_Resource_Name link and scrolling to the Sub Bottom Profiler Data section.
Fees: None.
Technical_Prerequisites:
Use of SEG-Y data requires specialized software, such as Reveal by Shearwater Geophysical; ProMax and Seisworks by Landmark Geophysical; FOCUS and SeisX by Paradigm Geophysical; SPW by Parallel Geoscience; VISTA by Seismic Image Software; SeiSee by Dalmorneftegeophysica (DMNG); amongst others.
Metadata_Reference_Information:
Metadata_Date: 20230809
Metadata_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
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P9MYL7WJ/2018-658-FA.chirp.metadata.html>
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