Alicia F. Balster-Gee Samuel Y. Johnson Andrew C. Ritchie Patrick E. Hart 20210122 seismic-reflection data in SEG-Y format data release DOI:10.5066/P92M2FZC Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P92M2FZC https://www.sciencebase.gov/catalog/item/5f74dae882cef8d1839a042c High-resolution chirp sub-bottom data were collected by the U.S. Geological Survey in April 2011 south of Bainbridge Island and west of Seattle in Puget Sound, Washington. Data were collected aboard the R/V Karluk during field activity K0211PS using an Edgetech SB-512i sub-bottom profiler. Sub-bottom acoustic penetration spans several tens of meters and is variable by location. Data were acquired to support the USGS Catastrophic Coastal and Marine Hazards Program to aide hazard assessment of the Seattle Fault zone in central Puget Sound. Data were collected to image a backthrust fault scarp and surrounding areas to determine locations of thicker sediment piles that contain long earthquake records. 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=K0211PS Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20110427 20110427 ground condition at time data were collected Complete None planned -122.546 -122.34597 47.60995 47.54231 ISO 19115 Topic Category geoscientificinformation oceans Data Categories for Marine Planning Substrate Distributions USGS Thesaurus sub-bottom profiling geospatial datasets marine geophysics Marine Realms Information Bank (MRIB) keywords seismic reflection profiling seabed acoustic methods mapping geophysics None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC USGS Metadata Identifier USGS:5f74dae882cef8d1839a042c Geographic Names Information System (GNIS) Puget Sound State of Washington Bainbridge Island Blake Island Harbor Island Seattle West Seattle Manchester Colby NGA GEOnet Names Server (GNS) Puget Sound 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/5f74dae882cef8d1839a042c?name=K0211PS_Chirp_Tracklines.png&allowOpen=true Map of chirp tracklines in Puget Sound, Washington PNG SEG-Y rev 1 Quality control was conducted during data acquisition and quality was assured during data processing No formal logical consistency tests were conducted, but quality control was conducted during acquisition. 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. Estimated to be no less than 3 m due to total propagated uncertainties of navigation as well as data processing. A formal accuracy assessment of the vertical positional information in the data set has not been conducted. Chirp sub-bottom data were collected using an Edgetech-512i sub-bottom profiler. Data were corrected for sub-bottom profiler tow depth, converted to envelope, and bad navigation fixes were removed. Navigation was converted from seconds of arc to decimal degrees. 20111120 Horizontal X and Y locations for each seismic profile location are stored in the SEG-Y data trace headers in header bytes 81 and 85. WGS 1984 UTM Zone 10N 0.9996 -123.0 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 attribute values 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 K0211PS_chirp.zip contains chirp sub-bottom (SEG-Y) data collected during USGS field activity K0211PS. The 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 processed seismic data per navigation line Winzip, 7-zip, or Winrar are free software that will open .zip files 1430 https://www.sciencebase.gov/catalog/file/get/5f74dae882cef8d1839a042c https://doi.org/10.5066/P92M2FZC Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of data and metadata. The second link points to a landing page with metadata and data. To download the data, it's recommended that you go to the website and take advantage of the large file handler. 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. 20210122 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