Metadata: 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: 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: 2022 Title: 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