CHIRP seismic-reflection and navigation data collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023)

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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: George R. Snyder
Originator: Alicia F. Balster-Gee
Originator: Jared W. Kluesner
Originator: Samuel Y. Johnson
Originator: Elisa Medri
Originator: Alex Simms
Originator: Stu Nishenko
Originator: H. Gary Greene
Originator: James E. Conrad
Publication_Date: 20230908
Title:

CHIRP seismic-reflection and navigation data collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023)

Edition: version 2.0
Geospatial_Data_Presentation_Form:

CHIRP seismic-reflection data in SEG-Y format and navigation polylines in shapefile format.

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9A0U8J7

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/P9A0U8J7
Larger_Work_Citation:

Citation_Information:

Geophysical and core sample data collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023)

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9A0U8J7

Publication_Information:

Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey

Online_Linkage: https://doi.org/10.5066/P9A0U8J7

Description:

Abstract:

CHIRP seismic-reflection data and associated navigation files were collected offshore central California in the vicinity of Morro Bay. These data were collected aboard the M/V Bold Horizon in October 2019 for use in regional hazard assessments relating to the Hosgri Fault.

Purpose:

Identification of fault-related submarine hazards is a primary mission of the USGS Coastal and Marine Hazards and Resources Program. The Hosgri Fault is a submarine fault system that likely poses the greatest submarine earthquake threat in the central California region. To gain a better understanding of this fault system, the USGS collected sparker multichannel seismic, CHIRP seismic, and sediment cores to enable a detailed investigation of its geologic history and ongoing activity. These data are intended to further our understanding of geologic hazards near the Hosgri Fault, improve risk assessments for local communities and critical infrastructure, and to provide data for future research on regional tectonic, sedimentary, and geomorphic evolution of coastal California. This work was funded through a Cooperative Research and Development Agreement (CRADA) between the USGS and Pacific Gas and Electric Corporation.

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=2019-651-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 data set 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: 20191018
Ending_Date: 20191024

Currentness_Reference: Ground conditions at time data were collected

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -121.094825
East_Bounding_Coordinate: -121.026572
North_Bounding_Coordinate: 35.498083
South_Bounding_Coordinate: 35.411261

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:d569cae9-ec10-4d21-a617-c45f1e7b2c11

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: sub-bottom profiling
Theme_Keyword: geospatial datasets

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: data processing
Theme_Keyword: seismic reflection profiling
Theme_Keyword: Global Positioning System (GPS) observations

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: seismic reflection

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: State of California
Place_Keyword: San Luis Obispo County
Place_Keyword: Cayucos
Place_Keyword: Cambria
Place_Keyword: Estero Bay

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. 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: 2019-651-FA_chirp_05.jpg
Browse_Graphic_File_Description: Example plot of processed CHIRP seismic data.
Browse_Graphic_File_Type: JPG

Data_Set_Credit:

USGS PCMSC Marine Facility personnel Rachel Marcuson assisted with CHIRP seismic data acquisition.

Native_Data_Set_Environment:

Field seismic data were collected with EdgeTech Discover acquisition software and processed using Shearwater Reveal (v. 5.1) on a CentOS Linux 7 operating system. Seismic tracklines were processed using ArcGIS Pro (v. 2.9.1) on a Windows 10 operating system.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Quality control of attribute accuracy was conducted during field data collection and processing workflows.

Logical_Consistency_Report:

All SEG-Y and navigation data were derived from the same instruments and processing workflows. Paired navigation and SEG-Y files have corresponding filenames and/or corresponding names indicated in shapefile attribute fields.

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:

A Hemisphere V110 GPS system was used for obtaining navigation data during the cruise with a stated accuracy of 0.6 meters (95 percent confidence).

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Two-way travel time in milliseconds referenced to sea level is provided in the SEG-Y files. Referencing two-way travel time to sea level is accomplished via an internal pressure logger within the CHIRP towfish with a stated accuracy of approximately 0.001 psi which is converted to water depth accurate to within ~1 cm. If this depth information is recorded, it is populated in the receiver group elevation trace header in the SEG-Y files (byte 49) in millimeters.

Lineage:

Process_Step:

Process_Description:

Field seismic data collection: Seismic data were collected onboard the M/V Bold Horizon using an EdgeTech SB-516 CHIRP sub-bottom profiler. Field data were collected in JSF and SEG-Y format. Navigation data were collected simultaneously with a Hemisphere V110 GPS and saved into the seismic headers during acquisition. Coordinates are in WGS84 UTM zone 10 north meters in bytes 181-185 and in Lat-Long decimal degrees in bytes 73-77 with a *10,000 scalar applied (byte 71).

Process_Date: 20191024

Process_Step:

Process_Description:

The following processing flow was carried out in Shearwater Reveal (v. 5.1) to process field data output to SEG-Y files: (1) Field-collected SEG-Y files were imported to Shearwater Reveal and navigation was converted to WGS 1984 coordinate system; (2) Water-bottom time horizon was picked on the enveloped chirp seismic and used in an automated swell correction;(3) swell corrections from the previous step were applied to the full-waveform chirp seismic; (4) a gapped deconvolution was applied; (5) Shearwater reveal internal seismic files were output to processed SEG-Y format files and navigation was converted to ArcGIS compatible shapefiles.

Process_Date: 20220826

Process_Step:

Process_Description:

Corrected author/Originator spelling in Citation and Larger Work Citation sections of metadata (Media to Medri). No data were changed. (scochran@usgs.gov)

Process_Date: 20230104

Process_Step:

Process_Description:

Added most processed and up to date chirp seismic lines 2, 3, 4, 9, 24, 25, and divided existing line 5 into 5a and 5b (grsnyder@usgs.gov).

Process_Date: 20230821

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 7

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000001
Longitude_Resolution: 0.000001
Geographic_Coordinate_Units: Decimal Degrees

Geodetic_Model:

Horizontal_Datum_Name: WGS 1984
Ellipsoid_Name: WGS 84
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257224

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:

Detailed_Description:

Entity_Type:

Entity_Type_Label: 2019-651-FA_chirp_nav.shp
Entity_Type_Definition: CHIRP seismic navigation in polyline format
Entity_Type_Definition_Source: U.S. Geological Survey

Attribute:

Attribute_Label: FID
Attribute_Definition: Internal feature number
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Sequential unique integers automatically generated

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature Geometry
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Feature shape automatically generated

Attribute:

Attribute_Label: FA_num
Attribute_Definition:

USGS Pacific Coastal and Marine Science Center (PCMSC) field activity identifier

Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain: Unique field activity ID generated by the USGS

Attribute:

Attribute_Label: Length
Attribute_Definition: Calculated length of the line in meters
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2475
Range_Domain_Maximum: 6553
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Line_num
Attribute_Definition: Name of trackline associated with seismic data.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:

Unrepresentable_Domain: Unique line number assigned in the field

Overview_Description:

Entity_and_Attribute_Overview:

Zip archive of seismic shots with time stamp in standard SEG-Y format. Data for individual seismic lines follow file name format of 2019-651-FA_seismic_chirp_LINE#.segy.

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: 1-831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Resource_Description:

Seismic data are available in SEG-Y format (2019-651-FA_seismic_chirp.zip) with navigation provided in a shapefile format (2019-651-FA_chirp_nav.zip) and accompanied by CSDGM FGDC compliant metadata.

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 processed seismic data per single navigation line. Data for individual seismic lines follow file name format of 2019-651-FA_seismic_chirp_LINE#.segy.

File_Decompression_Technique:

Zip files may be decompressed with any zip utility (for example, 7zip, WinZip, Archive Utility).

Transfer_Size: 1790

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9A0U8J7

Access_Instructions:

Data can be downloaded using the Network_Resource_Name link and scrolling to the Seismic Data section.

Digital_Form:

Digital_Transfer_Information:

Format_Name: shapefile
Format_Version_Number: ArcGIS Pro (version 2.9.1)
Format_Information_Content: Zip file contains polyline shapefiles of seismic navigation.
File_Decompression_Technique:

Zip files may be decompressed with any zip utility (for example, 7zip, WinZip, Archive Utility).

Transfer_Size: 1700.1679

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9A0U8J7

Access_Instructions:

Data can be downloaded using the Network_Resource_Name link and scrolling to the Seismic Data section.

Fees: None.

Technical_Prerequisites:

Viewing SEG-Y data requires specialized software. A list of common SEG-Y processing and visualization software is available at http://www.oilfieldwiki.com/wiki/List_of_free_geophysics_software. Shapefile navigation data can be viewed using any Geographic Information System (GIS) software (for example, ArcGIS, QGIS).

Metadata_Reference_Information:

Metadata_Date: 20230908
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_P9A0U8J7/2019-651-FA_seismic_chirp_metadata.html>