Reprocessed single channel sparker seismic reflection data offshore central California from USGS field activities S-6-08-SC and S-6-09-SC

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Frequently anticipated questions:

What does this data set describe?

Title:
Reprocessed single channel sparker seismic reflection data offshore central California from USGS field activities S-6-08-SC and S-6-09-SC
Abstract:
The U.S. Geological Survey collected high-resolution single channel minisparker data between Point Sal and Piedras Blancas in 2008 and 2009 with support from the Pacific Gas and Electric (PG&E) CRADA and the USGS Coastal and Marine Geology program. Reprocessing of this data in 2018 improved vertical resolution of the stratigraphy and structural deformation of the original data and was funded by an additional CRADA with PG&E.
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=S608SC https://cmgds.marine.usgs.gov/fan_info.php?fan=S609SC
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.
  1. How might this data set be cited?
    Kluesner, Jared W., Balster-Gee, Alicia F., and Johnson, Samuel Y., 20231107, Reprocessed single channel sparker seismic reflection data offshore central California from USGS field activities S-6-08-SC and S-6-09-SC: data release DOI:10.5066/P95HX7GB, U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, California.

    Online Links:

    Other_Citation_Details:
    Suggested Citation: Kluesner, J.W., Balster-Gee, A.F., Johnson, S.Y., 2023, Reprocessed single channel sparker seismic reflection data offshore central California from USGS field activities S-6-08-SC and S-6-09-SC: U.S. Geological Survey data release, https://doi.org/10.5066/P95HX7GB.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -121.37570
    East_Bounding_Coordinate: -120.63692
    North_Bounding_Coordinate: 35.68345
    South_Bounding_Coordinate: 34.84314
  3. What does it look like?
    preview.png (PNG)
    Map of S-6-08-SC and S-6-09-SC minisparker tracklines.
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 09-Jun-2008
    Ending_Date: 08-Aug-2009
    Currentness_Reference:
    ground condition at time data were collected
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: seismic-reflection data in SEG-Y format
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      Indirect_Spatial_Reference:
      Horizontal X and Y locations for the seismic profile locations are stored in the SEG-Y data trace headers in header bytes 73 and 77.
    2. What coordinate system is used to represent geographic features?
      The map projection used is WGS 1984 UTM Zone 10N.
      Projection parameters:
      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -123.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.0001
      Ordinates (y-coordinates) are specified to the nearest 0.0001
      Planar coordinates are specified in Meter
      The horizontal datum used is D WGS 1984.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    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

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Jared W. Kluesner
    • Alicia F. Balster-Gee
    • Samuel Y. Johnson
  2. Who also contributed to the data set?
    This dataset was collected by the U.S. Geological Survey in 2008 and 2009. Work was funded in part by a CRADA agreement between PG&E and the USGS and these data were made publicly available in 2009 (Sliter and others, 2009).
  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?

This work will aid the USGS in reviewing and refining existing interpretations, hazard assessments and development of new hypotheses. Particular targets include the Hosgri-San Gregorio fault system, and the Los Osos, and Shoreline faults. The ultimate goal of this work for both parties is to enhance earthquake hazard assessments by providing a more comprehensive understanding of regional geologic framework, seismic sequence stratigraphy and hazard assessment. These data and information are intended for science researchers, students, policy makers, and the general public.

How was the data set created?

  1. From what previous works were the data drawn?
    original SEG-Y format data (source 1 of 1)
    Sliter, Ray W., Triezenberg, Peter J., Hart, Patrick E., Watt, Janet T., Johnson, Samuel Y., and Scheirer, Daniel S., 2009, High-resolution seismic reflection and marine magnetic data along the Hosgri Fault Zone, central California: U.S. Geological Survey, online.

    Online Links:

    Type_of_Source_Media: online database
    Source_Contribution:
    This Open-File report contains the SEG-Y format single channel minisparker and marine magnetic data acquired during field activities S-6-08-SC and S-6-09-SC. This data release contains reprocessed single channel seismic data.
  2. How were the data generated, processed, and modified?
    Date: 19-Feb-2009 (process 1 of 2)
    Single channel minisparker data collected during USGS field activities S06-08-SC and S-6-09-SC were converted to SEG-Y format and were minimally processed and released in 2009 (Sliter and others, 2009). Data sources used in this process:
    • original SEG-Y format data
    Date: 04-Mar-2018 (process 2 of 2)
    Data released in 2009 was bandpass filtered and swell corrected using SIOSEIS software. Data were then converted to Seismic Unix format and trace balanced, trace mixed, and a predictive deconvolution was designed for each line. Following the deconvolution, a bandpass filter was applied as well as an automatic gain control. UTM zone 10N navigation was written to header bytes 73 and 77.
  3. What similar or related data should the user be aware of?
    Sliter, Ray. W., Triezenberg, Peter J., Hart, Patrick E., Watt, Janet T., Johnson, Samuel Y., and Scheirer, Daniel S., 2009, High-resolution seismic reflection and marine magnetic data along the Hosgri Fault Zone, central California.

    Online Links:

    Other_Citation_Details:
    Full citation details for the open file report: Sliter, Ray W., Triezenberg, Peter J., Hart, Patrick E., Watt, Janet T., Johnson, Samuel Y., and Scheirer, Daniel S., 2009, revised 2010, High-resolution seismic reflection and marine magnetic data along the Hosgri Fault Zone, central California: U.S. Geological Survey Open-File Report 2009-1100, version 1.1 [https://pubs.usgs.gov/of/2009/1100/].

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

  1. How well have the observations been checked?
    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.
  2. How accurate are the geographic locations?
    The horizontal positional accuracy of the seismic data thus linked to the Research Vessel Parke Snavely’s position is estimated to be within 30 meters (Sliter and others, 2009).
  3. How accurate are the heights or depths?
  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?
    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.

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 of the dataset and in products derived from these data. This information is not intended for navigation purposes.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - CMGDS
    2885 Mission Street
    Santa Cruz, CA

    831-427-4747 (voice)
    pcmsc_data@usgs.gov
  2. What's the catalog number I need to order this data set? These data are available in SEG-Y format (S-6-0#-SC.###.segy) contained in two zip files divided by field activity number (S-6-08-SC.segy.zip and S-6-09-SC.segy.zip) accompanied by a CSDGM FGDC-compliant metadata file linked (S-6-08_09-SC.metadata.txt).
  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 S-6-08-SC.segy.zip and S-6-09-SC.segy.zip) contains the reprocessed seismic data per navigation line in format SEG-Y (version SEG-Y rev 1) Size: 17100
      Network links: https://doi.org/10.5066/P95HX7GB
      Data format: Zip file S-6-09-SC.segy.zip contains the reprocessed seismic data per navigation line of in format SEG-Y (version SEG-Y rev 1) Size: 12100
      Network links: https://doi.org/10.5066/P95HX7GB
    • Cost to order the data: None.

  5. What hardware or software do I need in order to use the data set?
    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.

Who wrote the metadata?

Dates:
Last modified: 07-Nov-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_P95HX7GB/S-6-08_09-SC.minisparker.metadata.faq.html>
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