Alicia F. Balster-Gee Jared W. Kluesner Daniel S. Brothers James E. Conrad Ray W. Sliter 20170717 2.0 seismic-reflection data in SEG-Y format data release DOI:10.5066/F7CV4FW6 Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/F7CV4FW6 https://www.sciencebase.gov/catalog/item/5e42eb9ee4b0edb47be84547 Alicia F. Balster-Gee Jared W. Kluesner Daniel S. Brothers James E. Conrad Ray W. Sliter 2020 data release DOI:10.5066/F7CV4FW6 Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/F7CV4FW6 This data release contains 35 multichannel sparker and 24 multichannel minisparker seismic reflection (MCS) profiles that were collected in November of 2014 from the Catalina and Santa Cruz Basins offshore southern California by the U.S. Geological Survey Pacific and Coastal Marine Science Center. Data were collected aboard the University of California’s R/V Robert Gordon Sproul on USGS cruise 2014-645-FA. MCS profiles were collected to assess earthquake and submarine landslide hazards offshore southern California. Data were acquired to support USGS geologic hazards projects to aide hazard assessment and geologic structure mapping of southern California’s offshore Catalina, Catalina Ridge, San Clemente, and San Diego Trough Fault Zones. These data were collected to update the USGS Quaternary fault database and shaking hazard models developed by the Working Group on California Earthquake Probabilities. In addition, the survey imaged a large landslide complex in Santa Cruz Basin in order to determine causes and age of seafloor failure. Data collection was funded in part by UC Student Ship Funds. Chirp sub-bottom data were collected coincidentally. These data and information are intended for science researchers, students from elementary through college, policy makers, and general public. Additional information about the field activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-645-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. 20141112 20141125 ground condition at time data were collected Complete None planned -120.44300 -117.26803 34.22542 32.75509 USGS Metadata Identifier USGS:58d99b75e4b0543bf7fc64d3 ISO 19115 Topic Category geoscientificInformation oceans Data Categories for Marine Planning Bathymetry and Elevation USGS Thesaurus geospatial datasets marine geophysics Marine Realms Information Bank (MRIB) keywords continental margin seismic reflection profiling None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC minisparker Geographic Names Information System (GNIS) Pacific Ocean State of California Santa Catalina Island San Clemente Island San Nicolas Island Sant Barbara Island Two Harbors Avalon City of Long Beach City of San Diego City of Encinitas City of Huntington Beach Santa Barbara Channel Gulf of Santa Catalina Ventura County Santa Barbara County City of Ventura Santa Rosa Island Santa Cruz Island NGA GEOnet Names Server (GNS) Catalina Basin Emery Knoll Catalina Canyon Catalina Escarpment Osborn Bank Hueneme Canyon Santa Monica Basin Santa Cruz Basin Santa Cruz Canyon None 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. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov https://www.sciencebase.gov/catalog/file/get/58d99b75e4b0543bf7fc64d3?name=2014-645-FA_mcs_tracklines.png&allowOpen=true MCS trackline map PNG SEG-Y Rev 1 Identified as the best available version Multichannel seismic-reflection data were collected during USGS field activity 2014-645-FA using a 5kJ Delta sparker source for lines 1-17 and a 700J SIG-2mile minisparker source for lines 18-40. MCS data were recorded with a Geometrics 48-channel, 300-meter digital streamer. Depth control birds were used to fly the streamer at consistent depths below the sea surface. Quality control was conducted during the collection process. 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. Position data were provided by a Differential Global Positioning System (DGPS) navigation receiver. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. Depths shown in the seismic data files are in milliseconds (round trip travel time) and are referenced to sea level. Seismic-reflection profiles were collected during USGS field activity 2014-645-FA using a 5kJ Delta sparker source or a 700J Joule minisparker source and recorded with a 300-meter, 48-channel Geometrics digital seismic streamer with 6.25m group spacing. 20141125 MCS profiles were processed using SIOSEIS and Seismic Unix. SIOSEIS processing included conversion from SEGD to SEGY, geometry calculation using navigation, 20-1000Hz bandpass filter and CDP gather sorting. Seismic Unix processing included channel rejection, zerophase bandpass filtering, de-spike, butterworth minimum phase filter, NMO correction, DMO correction, pre-stak Stolt migration of CDP gathers, trace balancing, predictive deconvolution, trace mix, and AGC. Navigation was converted to UTM zone 11N and smoothed over 50m using a local regression algorithm in MatLab. Note that the repeating navigation at the beginning of each line is an artifact of the navigation smoothing and doesn’t affect the overall positional accuracy of the dataset. 20150130 For version 2.0 of this data release, additional lines of data were added. No original data were changed. The metadata file was revised to better describe the collection and processing of both the original and newly added data, all of which were handled in the same manner. The title of the data and the overall data release was changed to better reflect the geographic location of the data, and the authorship and ranking was revised. 20200201 Typo in Longitude of Central Meridian (longcm) tag was corrected. No data were changed. 20200531 Susan A Cochran U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical

2885 Mission St.

Santa Cruz CA 95060 United States 831-460-7545 scochran@usgs.gov Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 20201019 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Performed minor edits to the metadata to correct typos. No data were changed 20211013 U.S. Geological Survey Susan A. Cochran Geologist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Horizontal X and Y locations for each seismic profile location are provided in ASCII position files and are stored in the SEG-Y data trace headers in header bytes 73 and 77. WGS 1984 UTM Zone 11N 0.9996 -117.0 0.0 500000.0 0.0 coordinate pair 0.0001 0.0001 Meter D WGS 1984 WGS 1984 6378137.0 298.257223563 local surface 0.1 two-way travel time in milliseconds attribute values Navigation and seismic shots with time stamp in standard SEG-Y file format Society of Exploration Geophysicists (SEG) Technical Standards, available for download at http://seg.org/Publications/SEG-Technical-Standards U.S. Geological Survey - ScienceBase mailing and physical

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 1-888-275-8747 sciencebase@usgs.gov 2014-645-FA_mcs.zip This zip file contains multichannel seismic-reflection (SEG-Y) data collected during USGS field activity 2014-645-FA. These data are divided up and presented by navigation line, as reflected in the individual file names. 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. SEG-Y SEG-Y rev 1 Zip file contains the raw seismic data per navigation line. Winzip, 7-zip, or Winrar are free software that will open .zip files 7930 https://www.sciencebase.gov/catalog/file/get/5e42e63ee4b0edb47be8453b https://www.sciencebase.gov/catalog/item/5e42e63ee4b0edb47be8453b https://doi.org/10.5066/F7CV4FW6 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download a zip file containing the mcs data, metadata, and a trackline map. The second link points to a landing page for the chirp portion of the data release. The third link point to the landing page for the entire data release. None. Use of SEG-Y data requires specialized software, such as Reveal by Shearwater Geophysical; 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. 20211013 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998