Jared W. Kluesner Daniel S. Brothers Ray W. Sliter 2017 3D boomer seismic-reflection data in SEG-Y format data release DOI:10.5066/F7RV0MMK Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.5066/F7RV0MMK This dataset includes reprocessed boomer 3D seismic data collected by the Fugro Consultants Inc. in 2012, in Estero Bay, offshore of Morro Bay, central California. This data release includes boomer 3D seismic data collected in 2012 within Estero Bay, central California as part of PG&E’s Central California Seismic Imaging Project (Pacific Gas and Electric Company [PG&E], 2014). The U.S. Geological Survey conducted advanced post-processing on the data to remove noise and improve overall image quality, following the workflow described by Kluesner and Brothers, 2016. Following the generation of the cleaned 3D volume, data were exported using the OpendTect software package. The 3D data volume is in SEG-Y format and is provided here. 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=P0411CC Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20120822 20121005 ground condition at the time the data were collected Complete As needed -120.97733 -120.95432 35.32101 35.29019 USGS Metadata Identifier USGS:7c4a3fcc-4e59-410c-b00b-a04cbebbd998 Global Change Master Directory (GCMD) Bathymetry Continental Margins ISO 19115 Topic Category geoscientificInformation oceans USGS Thesaurus sub-bottom profiling Marine Realms Information Bank (MRIB) keywords seismic reflection profiling Data Categories for Marine Planning Bathymetry and Elevation None boomer U.S. Geological Survey USGS Coastal and Marine Geology Program CMG CMGP Pacific Coastal and Marine Science Center PCMSC Geographic Names Information System (GNIS) Pacific Ocean State of California San Luis Obispo County Morro Bay Estero Bay 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. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This information is not intended for navigational purposes. PCMSC Science Data Coordinator U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov SEG-Y Rev 1 D.R. Ebuna T.R. Mitchell P.J. Hogan S. Nishenko H.G. Greene 2013 26th Symposium on the Application of Geophysics to Engineering and Environmental Problems p. 311-320 Red Hook, NY Curran Associates, Inc. http://www.proceedings.com/18180.html Fugro Consultants Inc. 2012 Report No. PGEQ-PR-03 (Rev0), FSI Project No. 2011-4493 p. 1-67 Oakland, CA Fugro Consultants Inc. https://www.pge.com/includes/docs/pdfs/safety/systemworks/dcpp/report/Ch2.GEO.DCPP.TR.12.01_R1_AppA.pdf Jared W. Kluesner Daniel J. Brothers 2016 AAPG/SEG Interpretation volume 4, issue 1 Tulsa, OK Society of Exploration Geophysicists https://dx.doi.org/10.1190/INT-2015-0143.1 S. Nishenko P. Hogan R. Kvitek 2012 Sea Technology v. 53, p. 15-20 Arlington, VA Sea Technology https://dx.doi.org/10.1190/INT-2015-0143.1 Pacific Gas and Electric Company (PG&E) 2014 PG&E Technical Report GEO.DCPP.TR.14.02 Oakland, CA Fugro Consultants Inc. https://www.pge.com/includes/docs/pdfs/safety/systemworks/dcpp/report/Ch2.GEO.DCPP.TR.12.01_R1_AppA.pdf Identified as best available version. Seismic data were acquired using a triple-plate boomer source operated at 1.75 kJ and the P-Cable streamer system. 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 volumes are in milliseconds (round trip travel time) and are referenced to sea level. Vertical resolution is approximately 1 millisecond and vertical accuracy is approximately plus or minus 4 milliseconds depending on sea state. Seismic data were acquired using a triple-plate boomer source operated at 1.75 kJ and the P-Cable streamer system. The 3D data show a frequency range of approximately 100-700 Hz, with a dominant frequency of 200-225 Hz (PG&E, 2014). The P-Cable system consisted of 14, 8-channel digital streamers with 6.25 m hydrophone group spacing (Nishenko and others, 2012; Ebuna and others, 2013). Data were sampled at 0.25 ms with a record length of 0.75 s two-way travel-time. Seismic processing steps conducted by Fugro Consultants included quality control, tidal corrections, velocity analysis, NMO correction, stacking, surface related multiple elimination, deconvolution, crossline statics, and pre-stack migration (Fugro Consultants Inc., 2012; PG&E, 2014). However, upon public release and inspection by the USGS, significant high-frequency noise was observed, limiting the interpretation of imaged fault structures (Kluesner and Brothers, 2016). 2012 The publically released 3D seismic data were downloaded and analyzed by the USGS, and a post-stack data-conditioning workflow was designed to reduce noise and enhance the overall quality. The data conditioning workflow used on this dataset followed that of Kluesner and Brothers, 2016. Initially, data were imported into the OpendTect software package and a dip-steering volume was calculated using a 1x1x1 (inline, crossline, sample interval) calculation window. Following dip-steering calculation a median filter was applied with a 1x1x1 stepout, resulting in a smoothed 3D volume of dip and azimuth information for all seismic events. The dip-steered median filter was then applied to the data between 0 and 0.5 s TWTT, with a 1x1 (inline, crossline) stepout. Filtered results were then subtracted from the original data to produce a volume with significant noise suppression. Both random and apparent acquisition noise were suppressed, while enhancing laterally continuous events. Following generation of the cleaned data volume the results were exported as a new 3D SEG-Y file using the OpendTect software package. 2016 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 Data were moved to a new repository, and metadata was edited to reflect the new location. Other edits were performed as needed to bring the metadata up to PCMSC standards, including a slight rewording of the title. No data were changed. 20210831 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 the seismic profile locations are provided in shapefiles and are stored in the SEG-Y data trace headers in the standard header locations. 0.00001 0.00001 Decimal degrees D_WGS_84 WGS_84 6378137.0 298.257223563 Local surface 0.1 meters 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 - CMGDS mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 USA 1-831-427-4747 P-04-11-CC_eb.mcs3d.boomer.zip This zip file contains reprocessed seismic-reflection 3D volume (SEG-Y) and navigation (shapefile) data collected during field activity P-04-11-CC. 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 reprocessed seismic data Winzip, 7-zip, or Winrar are free software that will open .zip files 1147 https://doi.org/10.5066/F7RV0MMK None 20211021 PCMSC Science Data Coordinator U.S. Geological Survey, Pacific Coastal and Marine Science Center mailing and physical

2885 Mission St.

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