Chirp sub-bottom data collected offshore Northern California during USGS field activity 2019-643-FA

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Alicia F. Balster-Gee
Originator: Jenna C. Hill
Originator: Janet T. Watt
Originator: Daniel S. Brothers
Originator: Nora M. Nieminski
Originator: Travis Alongi
Originator: Gerald A. Hatcher
Originator: Brandon Nasr
Publication_Date: 20230720
Title:

Chirp sub-bottom data collected offshore Northern California during USGS field activity 2019-643-FA

Geospatial_Data_Presentation_Form: seismic-reflection data in SEG-Y format
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P998EC72

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/P998EC72
Larger_Work_Citation:

Citation_Information:

Multichannel minisparker seismic-reflection and chirp subbottom data collected offshore Northern California during USGS field activity 2019-643-FA

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P998EC72

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., Hill, J.C., Watt, J.T., Brothers, D.S., Nieminski, N.M., Alongi, T., Hatcher, G.A., and Nasr, B., 2023, Multichannel minisparker seismic-reflection and chirp subbottom data collected offshore Northern California during USGS field activity 2019-643-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P998EC72

Online_Linkage: https://doi.org/10.5066/P998EC72

Description:

Abstract:

Chirp sub-bottom data were collected by the U.S. Geological Survey in 2019 offshore Humboldt County of northern California to expand data coverage along the southern Cascadia Margin.

Purpose:

This dataset contains processed Chirp sub-bottom data collected by the U.S. Geological survey during field activity 2019-643-FA aboard the M/V Bold Horizon. Data were acquired to characterize offshore faults and to study sediment distribution. Chirp data were collected coincidently with multichannel seismic-reflection data (MCS) and were used to determine sediment core targets for marine geohazard studies. These data and information are intended for science researchers, students, policy makers, and general public.

Supplemental_Information:

Additional information about the field activity from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2019-643-FA
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20190927
Ending_Date: 20191010

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: -124.71130
East_Bounding_Coordinate: -124.27460
North_Bounding_Coordinate: 41.573364
South_Bounding_Coordinate: 40.655668

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:2749bf05-e952-4d37-a351-41527e4f6fc2

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme_Keyword: location

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: substrate

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: marine geophysics
Theme_Keyword: geospatial datasets
Theme_Keyword: sub-bottom profiling

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: seismic methods
Theme_Keyword: seismic reflection profiling
Theme_Keyword: data processing

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: field activity number 2019-643-FA
Theme_Keyword: seismic navigation
Theme_Keyword: seismic reflection
Theme_Keyword: SEG-Y traces

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: Eureka
Place_Keyword: Trinidad
Place_Keyword: Klamath
Place_Keyword: Crescent City
Place_Keyword: Eel River
Place_Keyword: Mad River
Place_Keyword: Little River
Place_Keyword: Klamath River

Place:

Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: Eel Canyon
Place_Keyword: Trinidad Canyon

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: 2019-643-FA.MCS.preview.png
Browse_Graphic_File_Description:

Map of MCS profiles acquired during USGS field activity 2019-643-FA.

Browse_Graphic_File_Type: PNG

Data_Set_Credit:

Data collection efforts were supported in part by an Interagency Agreement (IAA) between the Bureau of Ocean Energy Management (BOEM) and the U.S. Geological Survey. The authors acknowledge the crew of the M/V Bold Horizon and those involved in in survey planning and execution.

Native_Data_Set_Environment:

SEG-Y processing was conducted in Sioseis seismic software (https://sioseis.ucsd.edu/). QGIS-LTR (version 3.21, https://www.qgis.org/en/site/) was used to produce the navigation trackline shapefile and preview image.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Quality control was conducted during acquisition. Some seismic profiles have gaps in them due to system crashes or intentional shutdowns as required, under terms of our operating permit, to protect marine mammals. Minor swell correction artifacts exist at line starts and ends as well as in areas where seafloor amplitudes are low.

Logical_Consistency_Report:

Quality control was conducted during acquisition and processing to ensure consistency of SEG-Y header navigation and seismic-reflection data that matches bathymetry along the tracklines.

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:

+/- 0.6m 95 percent confidence (DGPS) (http://dev.wr.usgs.gov/idb/media/service_materials/2022/12/07/101121522789/Hemisphere_V100specsheet.pdf)

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 21 traces and the water column was muted. 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 and 73/77 in UTM zone 10N coordinates. SEG-Y data files were compressed into the zip file 2019-643-FA.chirp.segy.zip.

Process_Date: 20210225

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

Horizontal X and Y locations for the seismic profile locations are provided and stored in the SEG-Y data trace headers in header bytes 81 and 85 locations.

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

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview: 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:

SEG-Y data are available in the zip file 2019-643-FA.chirp.zip that contains 43 standard SEG-Y format files of seismic traces with time stamp (Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards). SEG-Y files are named 2019-643-FA.chirp.##.chirp.sgy where ## is the line name and 2019-643-FA is the USGS field activity identifier.

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:

The zip file can be decompressed with any zip utility (for example, 7zip, Keka, WinZip).

Transfer_Size: 15800

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P998EC72

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the sub-bottom profiler data section.

Fees: None.

Technical_Prerequisites:

Use of SEG-Y data requires specialized software, such as 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: 20230720
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_P998EC72/2019-643-FA.chirp.metadata.html>