Metadata: 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: Chirp sub-bottom 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: 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: 2024 Title: 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: Chirp sub-bottom 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: Chirp sub-botttom data and coincident high-resolution multichannel seismic (MCS) 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:6c1ad51b-055a-4904-9150-b16ec59bb706 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.chirp.preview.png Browse_Graphic_File_Description: Map of Chirp 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 chirp data acquisition, an Edgetech 516i chirp towfish was towed several meters below the sea surface from the stern of the vessel. Shearwater Reveal 4 (seismic processing software) was 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. Because the chirp data was collected coincident with sparker data, the sparker signature can be seen walking across some chirp profiles at various times. 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. Lineage: Process_Step: Process_Description: Raw SEG-Y format seismic shots were imported into Shearwater Reveal 4 (seismic software) and navigational data was converted to UTM zone 11N and stored in header bytes 81 ad 85. Further processing included: transform to envelope, water column and bottom mute, swell correction using the peak trace amplitude time averaged over the period of the swell (usually between 21 and 55 traces). Sometimes two passes of swell correction were required when there were mixed swell periods. SEG-Y files were named 2021-614-FA.chirp.###.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.chirp.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: 186 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.chirp.###.segy where ### is the line number) and are contained in a single zip file (2021-614-FA.chirp.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: 8000 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.chirp.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