Multichannel minisparker seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone

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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: Travis Alongi
Originator: Alicia F. Balster-Gee
Originator: Jared W. Kluesner
Originator: George R. Snyder
Originator: Daniel S. Brothers
Originator: James E. Conrad
Originator: Rachel K. Marcuson
Publication_Date: 20240403
Title:

Multichannel minisparker seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone

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

Series_Name: data release
Issue_Identification: DOI:10.5066/P9HCOSDF

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/P9HCOSDF
Larger_Work_Citation:

Citation_Information:

Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone

Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P9HCOSDF

Publication_Information:

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

Other_Citation_Details:

Suggested Citation: Alongi, T., Balster-Gee, A.F. Kluesner, J.W., Snyder, G.R., Brothers, D.S., Conrad, J.E., Marcuson, R.K., 2024, Multichannel minisparker and chirp seismic reflection data collected during USGS field activity 2021-614-FA along the Palos Verdes Fault Zone: U.S. Geological Survey data release, https://doi.org/10.5066/P9HCOSDF.

Online_Linkage: https://doi.org/10.5066/P9HCOSDF

Description:

Abstract:

High-resolution multichannel minisparker seismic reflection (MCS) data were collected by the U.S. Geological Survey in May of 2021 along the Palos Verdes Fault Zone in San Pedro Bay and San Pedro Channel. MCS data were acquired coincident with chirp sub-bottom data.

Purpose:

The high-resolution multichannel seismic (MCS) and coincident Chirp sub-bottom data were acquired during USGS field activity 2021-614-FA aboard the R/V Sproul in May of 2021. The survey was conducted in the offshore region of southern California, specifically in the inner continental borderlands tectonic region. The focus of the survey was to collect seismic lines perpendicular to the Palos Verdes Fault with close adjacent line spacing of approximately 500 meters to explore the spatial properties and distribution of faulting in the shallow subsurface. These data and information are intended for science researchers, students, policy makers, and the general public.

Supplemental_Information:

Additional information about the field activity or activities from which these data were derived is available online at:
https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-614-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: 20210513
Ending_Date: 20210522

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: -118.54136467
East_Bounding_Coordinate: -117.84641504
North_Bounding_Coordinate: 33.89364486
South_Bounding_Coordinate: 33.37643027

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:855f4dac-9981-4966-b0c5-ba4231664197

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: 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 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: Rancho Palos Verdes
Place_Keyword: Point Vicente
Place_Keyword: Long Beach
Place_Keyword: San Pedro
Place_Keyword: Seal Beach
Place_Keyword: Huntington Beach
Place_Keyword: Newport Beach
Place_Keyword: Laguna Beach
Place_Keyword: Dana Point
Place_Keyword: Santa Catalina Island
Place_Keyword: Avalon
Place_Keyword: Two Harbors

Place:

Place_Keyword_Thesaurus: NGA GEOnet Names Server (GNS)
Place_Keyword: San Pedro Basin

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Port of Los Angeles
Place_Keyword: San Pedro Channel

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: 2021-614-FA.mcs.preview.png
Browse_Graphic_File_Description:

Map of MCS tracklines acquired during USGS field activity 2021-614-FA

Browse_Graphic_File_Type: PNG

Data_Set_Credit:

This data collection was funded in part by the Bureau of Ocean Energy Management (BOEM) and the University of California Santa Cruz. The authors acknowledge the crew of Scripps Institution of Oceanography’s R/V Robert Gordon Sproul and all those involved in in survey planning and execution.

Native_Data_Set_Environment:

For the MCS data acquisition, a SIG multi-tip sparker sound source was used, towed several meters below the sea surface. The source signal was recorded using hydrophones, although the recorded data were not used in subsequent processing steps. The seismic reflection data was recorded using a 120 meter Geometrics GeoEel 40-channel streamer, with group spacings of 3.125 meters and a sampling rate of 0.25 milliseconds. The tow depth of the streamer was controlled using Geospace Navigator birds, maintaining a depth of approximately 2 meters below the sea surface. The tow vessel operated at speeds of 4 knots during data collection. Shearwater Reveal 5 (seismic processing software) were used to process the raw seismic data.

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:

R/V Sproul uses a Furuno GP-90D (Differential GPS) positioning system with a manufacturer’s stated accuracy of 13 meters (95%). Accuracies of final products may be lower due to total propagated uncertainties of the mapping systems, which include position and motion compensation system, navigation, as well as data processing that includes calculating the source layback from the stern of the vessel (37 meters based on the length of the deployed cable), and calculation of offset distance (78 meters from source to channel 1) and CMP bins between the sparker source position and the position of the Geometrics streamer.

Lineage:

Process_Step:

Process_Description:

Raw DEG-D format seismic shots were imported into Shearwater Reveal 5 (seismic software) and navigational data was converted to UTM zone 11N. Further processing included: geometry calculation and CMP binning at 3.125 meters, despike, water column mute, 30-60-1100-1800Hz bandpass filter, velocity analysis ~100 CMPs amd with significant geology change, trim statics, Surface Related Multiple Elimination (SRME), pre-stack spiking deconvolution (2.9 millisecond gap length, 15 millisecond operator length, filter was designed 200 milliseconds below the water bottom time and over 21-traces), 50-100-700-900Hz bandpass filter, normal move out (NMO) using picked velocities and a stretch mute, stack, post-stack time migration at 1400 meters per second for frequencies less than 750 Hz, structurally oriented denoise (using 50-100-130-200Hz low passed data to estimate dips over 20 CMPs and 30 milliseconds time), data exported to SEG-Y format with BIN_X and BIN_Y CMP locations in UTM zone 11N coordinates and all other standard SEG-Y format byte locations. SEG-Y files were named 2021-614-FA.mcs.###.segy where ###is the line number and 2021-614-FA is the USGS survey identifier. SEG-Y files were zipped into the file 2021-614-FA.mcs.zip.

Process_Date: 20221220

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: 99

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: WGS 1984 UTM Zone 11N
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -117.0
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

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: These data are available in SEG-Y format (2021-614-FA.mcs.###.segy where ###is the line number) and are contained in a single zip file (2021-614-FA.mcs.zip) 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 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: 5900

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P9HCOSDF

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling to the Sparker Data section and selecting the 2021-614-FA.mcs.zip link.

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: 20240403
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_P9HCOSDF/2021-614-FA.mcs.metadata.html>