Alicia F. Balster-Gee Daniel S. Brothers David P. Finlayson Lee Liberty Peter Dartnell Gerry A. Hatcher Peter J. Haeussler Mike Byerly 2019 seismic-reflection data in SEG-Y format data release DOI:10.5066/P9K1YQ35 Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9K1YQ35 https://www.sciencebase.gov/catalog/item/5c5ccd12e4b0fe48cb31259d Alicia F. Balster-Gee Daniel S. Brothers David P. Finlayson Lee Liberty Peter Dartnell Gerry A. Hatcher Peter J. Haeussler Mike Byerly 2019 data release DOI:10.5066/P9K1YQ35 Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/P9K1YQ35 High-resolution single channel minisparker seismic-reflection data were collected by the U.S. Geological Survey and the Alaska Department of Fish and Game in May 2014 in southern Prince William Sound southwest of Chenega and from southwest of Montague Island, Alaska. Data were collected aboard the Alaska Department of Fish and Game vessel, R/V Solstice, during field activity 2014-622-FA, using a 500 Joule SIG 2-mille minisparker sound source and a single channel streamer and recorded with a Triton SB-Logger. This work was funded by the U.S. Geological Survey (USGS) Coastal and Marine Hazards and Resources Program (CMHRP) Marine Geohazards Project and the Alaska Department of Fish and Game (ADFG). The high-resolution seismic-reflection profiles of bedrock, sediment deposits, and tectonic structure provide geologic information that is essential to hazard assessment, regional sediment management, and coastal and marine spatial planning at Federal, State, and local levels, as well as to future research on the geomorphic, sedimentary, tectonic, and climatic record of southeastern Alaska. These data and information are intended for science researchers, students from elementary through college, policy makers, and the 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=2014-622-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. 20140507 20140522 ground condition at time data were collected Complete None planned -149.76600000 -145.84350586 60.65164737 59.05647108 USGS Metadata Identifier USGS:5c5ccd12e4b0fe48cb31259d ISO 19115 Topic Category geoscientificinformation 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 Geographic Names Information System (GNIS) Pacific Ocean State of Alaska Gulf of Alaska Prince William Sound Chenega Island Evans Island Montague Island Montague Strait Dangerous Passage Knight Island Passage Icy Bay Nassau Bay Jackpot Bay Whale Bay Bainbridge Passage Port Bainbridge NGA GEOnet Names Server (GNS) North Pacific Ocean 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(s) 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/5c5ccd12e4b0fe48cb31259d?name=2014-622-FA_seismic_lines.png&allowOpen=true Index map of seismic lines JPEG SEG-Y Rev 1 Daniel S. Brothers Peter J. Haeussler Lee Liberty David Finlayson Eric Geist Keith Labay Mike Byerly 2016 Brothers and others, 2016, A submarine landslide source for the devastating 1964 Chenega tsunami, southern Alaska: Earth and Planetary Science Letters, v. 438, p.112-121. https://doi.org/10.1016/j.epsl.2016.01.008 Identified as best available version Subbottom data were collected during USGS cruise 2014-622-FA using a single channel digital hydrophone streamer and a 500-Joule minisparker source. 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. Depths shown in the seismic data files are in milliseconds (round trip travel time) and are referenced to sea level. Seismic-reflection data were collected using a minisparker system that creates an acoustic signal by discharging a 500-Joule, high voltage pulse between electrodes and a ground that generates a frequency spectrum between 400 and 1,000 Hz. Data were acquired using a single channel digital hydrophone streamer and recorded in SEG-Y 32-bit floating point using a Triton SB-Logger. collection 20140522 Seismic-reflection data were processed using SIOSEIS software. Seismic lines 1-5 and 60-98 are minimally processed (due to limited visible structure beneath a hard seafloor) with a zero phase bandpass filter that limits the spectrum to 120 and 800 Hz. Seismic lines 6-59 and 99-138 are fully processed; zero phase band pass filter from 120-800Hz, added a manual water bottom time pick for each trace from Kingdom Suite, swell removal over 25 traces, three trace running record mix, water column mute, a second zero phase bandpass filter from 120-800Hz, and applied a full-trace automatic gain control. processing 20141201 Edits were made to standardize a few of the "None" keywords. 20190620 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 Horizontal X and Y locations for the seismic profile locations are provided in ASCII position files and are stored in the SEG-Y data trace headers in header bytes 81 and 85. WGS 1984 UTM Zone 6N 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 meters Attribute values Seismic shots with time stamps 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 These data are available in SEG-Y format, and include FGDC-compliant metadata as well as a browse graphic. 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 SEGY 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 7380 https://www.sciencebase.gov/catalog/item/requestDownload/5c5ccd12e4b0fe48cb31259d?filePath=__disk__4f%2F46%2Fba%2F4f46ba86c0ac6e7381f4dad4fb40d21b6bb66dc6 https://www.sciencebase.gov/catalog/item/5c5ccd12e4b0fe48cb31259d https://doi.org/10.5066/P9K1YQ35 Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of the SEG-Y data. The second link points to a page with the SEG-Y data, metadata, and a browse graphic. The third link points to the landing page for the entire data release. None. 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. 20201019 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