Coordinates of vibracores collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023)

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Frequently anticipated questions:

What does this data set describe?

Title:
Coordinates of vibracores collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023)
Abstract:
This dataset includes coordinate information for sediment cores 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.
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.
  1. How might this data set be cited?
    Snyder, George R., Balster-Gee, Alicia F., Kluesner, Jared W., Johnson, Samuel Y., Medri, Elisa, Simms, Alex, Nishenko, Stu, Greene, H. Gary, and Conrad, James E., 20230908, Coordinates of vibracores collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023): data release DOI:10.5066/P9A0U8J7, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    This is part of the following larger work.

    Snyder, George R., Balster-Gee, Alicia F., Kluesner, Jared W., Johnson, Samuel Y., Medri, Elisa, Simms, Alex, Nishenko, Stu, Greene, H. Gary, and Conrad, James E., 2022, Geophysical and core sample data collected offshore central California, during field activity 2019-651-FA (ver 2.0, August 2023): data release DOI:10.5066/P9A0U8J7, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -121.080024
    East_Bounding_Coordinate: -121.043532
    North_Bounding_Coordinate: 35.477597
    South_Bounding_Coordinate: 35.419749
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 18-Oct-2019
    Ending_Date: 24-Oct-2019
    Currentness_Reference:
    Ground conditions at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: ESRI shapefile
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point (9)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is WGS 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257224.
      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
  7. How does the data set describe geographic features?
    2019-651-FA_cores_locations.zip
    sampling locations of cores. (Source: U.S. Geological Survey)
    FID
    Internal feature number (Source: Esri) Sequential unique numbers automatically generated
    Shape
    Feature Geometry (Source: Esri) Coordinates defining the feature
    Core
    Naming ID of the core (Source: U.S. Geological Survey) Unique core identification assigned in the field.
    LONG
    Longitude where core was collected in decimal degrees. (Source: Onboard Hemishphere V110 GPS)
    Range of values
    Minimum:-121.080011
    Maximum:-121.043532
    Units:meters
    Resolution:0.000001
    Depth
    Water depth where core was collected (Source: U.S. Geological Survey)
    Range of values
    Minimum:72
    Maximum:113
    Units:meters
    Resolution:1
    LAT
    Latitude where core was collected in decimal degrees. (Source: Onboard Hemishphere V110 GPS)
    Range of values
    Minimum:35.419749
    Maximum:35.477592
    Units:meters
    Resolution:0.000001
    CoreLength
    Total length of the core in centimeters. (Source: U.S. Geological Survey)
    Range of values
    Minimum:50
    Maximum:297
    Units:meters
    Resolution:1
    CoreType
    Coring mechanism (Source: U.S. Geological Survey)
    ValueDefinition
    vibracorecore was collected using a Rossfelder P-5 vibracore.
    Entity_and_Attribute_Overview: Zip file of core collection locations in shapefile format.
    Entity_and_Attribute_Detail_Citation: U.S. Geological Survey

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • George R. Snyder
    • Alicia F. Balster-Gee
    • Jared W. Kluesner
    • Samuel Y. Johnson
    • Elisa Medri
    • Alex Simms
    • Stu Nishenko
    • H. Gary Greene
    • James E. Conrad
  2. Who also contributed to the data set?
    USGS PCMSC Marine Facility personnel Rachel Marcuson, Jenny McKee, Cordell Johnson, and Dan Powers led vibracore collection operations.
  3. To whom should users address questions about the data?
    U.S. Geological Survey, Pacific Coastal and Marine Science Center
    Attn: PCMSC Science Data Coordinator
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov

Why was the data set created?

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.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 26-Aug-2022 (process 1 of 3)
    Cores were collected aboard the M/V Bold Horizon using a Rossfelder P-5 vibracorer on U.S. Geological Survey cruise 2019-651-FA. Latitude and longitude values were taken from the M/V Bold Horizon’s Hemisphere V110 GPS system, and depth values were taken from the M/V Bold Horizon’s Furuno FCV-382 echosounder. Field-collected navigation data were output in shapefile format.
    Date: 04-Jan-2023 (process 2 of 3)
    Corrected author/Originator spelling in Citation and Larger Work Citation sections of metadata (Media to Medri). No data were changed. (scochran@usgs.gov)
    Date: 21-Aug-2023 (process 3 of 3)
    Coordinates for cores HF-12 and HF-8 added to shapefile (grsnyder@usgs.gov).
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Quality control of attribute accuracy was conducted during field data collection and processing workflows.
  2. How accurate are the geographic locations?
    A Hemisphere V110 GPS system was used for obtaining latitude and longitude point locations during the cruise with a stated accuracy of 0.6 meters (95 percent confidence).
  3. How accurate are the heights or depths?
    Depth values were taken from the M/V Bold Horizon’s Furuno FCV-382 echosounder. No formal vertical accuracy tests were conducted.
  4. Where are the gaps in the data? What is missing?
    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.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical consistency tests were conducted.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
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.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - CMGDS
    2885 Mission Street
    Santa Cruz, CA

    1-831-427-4747 (voice)
    pcmsc_data@usgs.gov
  2. What's the catalog number I need to order this data set? Core coordinates are provided in a shapefile format (2019-651_cores_locations.zip) accompanied by CSDGM FGDC compliant metadata.
  3. What legal disclaimers am I supposed to read?
    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.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format: Zip file contains point shapefile of core collection locations. in format shapefile (version ArcGIS Pro (version 2.9.1)) Size: 0.004
      Network links: https://doi.org/10.5066/P9A0U8J7
    • Cost to order the data: None.

  5. What hardware or software do I need in order to use the data set?
    Shapefile navigation data can be viewed using any Geographic Information System (GIS) software (for example, ArcGIS, QGIS).

Who wrote the metadata?

Dates:
Last modified: 08-Sep-2023
Metadata author:
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Attn: PCMSC Science Data Coordinator
2885 Mission Street
Santa Cruz, CA

831-427-4747 (voice)
pcmsc_data@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P9A0U8J7/2019-651-FA_cores_location_metadata.faq.html>
Generated by mp version 2.9.51 on Fri Sep 15 14:20:46 2023