U.S. Geological Survey 2015 1.0 vector digital data data release DOI:10.5066/F7MW2F60 Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.5066/F7MW2F60 https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/tracks/2014-002-FA_MCSrps.zip Elizabeth A. Pendleton S.D. Ackerman W.E. Baldwin W.W. Danforth D.S. Foster E.R. Thieler L.L. Brothers 2015 2.0 view data release DOI:10.5066/F7MW2F60 Reston, VA U.S. Geological Survey https://doi.org/10.5066/F7MW2F60 The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework that governs coastal system evolution at storm-event and longer timescales. Data collected during the 2014 cruise include swath bathymetry, sidescan sonar, chirp and boomer seismic-reflection profiles, acoustic Doppler current profiler, and sample and bottom photograph data. Processed data in raster and vector format are released here for the swath bathymetry, sidescan sonar, and seismic-reflection profiles. More information about the USGS survey conducted as part of the Hurricane Sandy Response-- Geologic Framework and Coastal Vulnerability Study can be found at the project website or on the WHCMSC Field Activity Web pages: https://woodshole.er.usgs.gov/project-pages/delmarva/ and https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-002-FA This dataset contains reflection point navigation for approximately 1700 km of multi-channel streamer seismic-reflection data collected by the U.S. Geological Survey during cruise 2014-002-FA along the Delmarva Peninsula, MD and VA. This information can help spatially correlate the seismic-reflection profiles with other data in the GIS. 20140618 20140627 ground condition Complete None planned -75.567453 -74.685475 38.417831 37.538758 USGS Metadata Identifier USGS:a9b9ea42-9a22-49e1-b021-7cc85703683e None U.S. Geological Survey USGS Woods Hole Coastal and Marine Science Center WHCMSC Coastal and Marine Geology Program CMGP seismic profile SEGY seismic reflection subbottom WHCMSC field activity serial number 2014-002-FA M/V Scarlett Isabella boomer S-boom reflection point navigation multi-channel streamer GeoEel Geometrics Applied Acoustics Esri Shapefile reflection point ISO 19115 Topic Category location oceans geoscientificInformation USGS Thesaurus navigational data marine geophysics geospatial datasets None North America Atlantic Ocean United States Maryland Delaware Virginia Assateague Island Ocean City Wallops Island Parramore Island Chincoteague Island Chincoteague Bay Delaware Bay Assateague Island National Seashore Chincoteague National Wildlife Refuge Isle of Wight Bay Fenwick Island Assawoman Bay Cape Henlopen Rehoboth Beach Delaware Seashore State Park Bethany Beach Toms Cove Berlin None Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset. Elizabeth A. Pendleton U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543-1598 USA 508-548-8700 x2259 508-457-2310 ependleton@usgs.gov https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/tracks/MCS_rp.png Woods Hole Coastal and Marine Science Center MCS reflection points along the Delmarva Peninsula PNG Microsoft Windows 7 Enterprise Service Pack 1; ArcGIS Desktop 9.3 Service Pack 1; Build 1850 Any spurious data points were removed during processing. For each seismic trackline there is one seismic-profile image that is hyperlinked by the field 'image'. No duplicate reflection points exist. Places where navigation was recorded but no seismic data were logged are not included such as turns and transits. There is no image, trackline, or reflection points for l7f1; the S-Boom was not firing, so no data were collected. Differential Global Positioning System (DGPS) navigation data were acquired with a Hemisphere receiver and recorded with HYPACK (www.hypack.com). The DGPS antenna was located on the port-side of the acquisition van. The applied acoustics S-Boom source was towed 20-m astern of the M/V Scarlet Isabella. The 100-m long GeoEel 16-channel streamer was towed from the starboard side of the M/V Scarlett Isabella on a 4.82 m boom with 20 m of tow cable and 10 m of isolation in front of the start of the active channel. The Geometrics CNT-1 acquisition software logged the navigation coordinates (in arc seconds) to individual trace headers. Layback distance between the Hemisphere antenna and the source and receiver were calculated in post processing. The resulting horizontal accuracy is assumed to be +/- 2 m; however, inaccuracies likely exceed this value due to uncertainty of azimuths calculated in the layback correction (described in the processing steps). U.S. Geological Survey 2015 raster digital data disc 20140618 20140627 ground condition MCS data MCS seismic data were collected using S-Boom source and a 100-m long GeoEel 16 channel streamer. The applied acoustics S-Boom source was towed astern of the M/V Scarlet Isabella at a power level between 200 and 300 joules. The Geometrics GeoEel, 16-channel liquid filled digital streamer was towed from the starboard side of the vessel, and the center of the first channel of the active section was 10 meters aft of the boomer source. The streamer had a group interval of 3.25 meters connected to Geometrics Streamer Power Supply Unit (SPSU). Data were acquired in Geometrics SEG-D format on Windows PC controller system using Geometrics CNT-1 software. The sample interval was 0.25 ms. GeoEel Configuration: Lines l1f1-l7f1 and t1fl-t6f1 had weight (2 kilograms) on the middle of each active section. From line t7f1 through to the end of survey the weight was removed from the two active sections (head and tail). S-Boom configuration: Lines l1f1, l2f1, and t1f1 used 2 plates at 200 joules; lines t2f1, t3f1, l3f1, and l4f1 used 1 plate at 200 joules; and lines from t4f1 to the end of survey used 3 plates at 300 joules. A SIOSEIS seismic processing software script was used as follows: the raw SEG-D shot files were read with the process SEGDDIN specifying geometrics format; the process HEADER was used to insert time of day into the header based on the start and end times recorded in the HYPACK files and what was entered in the survey log. The process GEOM was used to describe the shot and streamer geometries and to calculate the reflection point (RP) numbers used to gather (sort traces) the seismic line. The process GEOM also set the shot-receiver distance into the trace header of every trace. GEOM type 6 was specified (because positions were absent or bad in the header), which computes a distance from last shot (DFLS) for each shot based on the shot time in the header and the navigation from an ASCII file containing time and position. The ASCII navigation file was derived from the HYPACK data and merged with reflection point files with the Unix join command. The process GATHER was used to sort the shot order traces by the RP numbers (computed by GEOM). A normal move out (NMO) applied a travel time correction to each trace based on time offset and a velocity of 1500 m/s. A script was used to apply layback to the navigation supplied from HYPACK. Using Easting and Northing coordinates (UTM Zone 18 N, WGS84) from the trace headers, the script calculated easting and northing differential values between trace positions. Headings between consecutive traces were calculated using the arctangent function (arctan2(dy,dx)), and reciprocal back bearings were determined using a lookup table. Back bearings were smoothed along track using a moving median function. Layback easting and northing offsets were calculated by multiplying the linear distance between the GeoEel and the shipboard DGPS receiver by the sine and cosine of the smoothed back bearing, respectively. Offset values were then added to the original coordinates to produce layback positions. Lastly, the RP trace gathers were written with the process DISKOX in SEG-Y rev. 1, IEEE floating point format. This step and all subsequent steps were completed by Dave Foster. 2014 Dave Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2271 (508) 457-2310 dfoster@usgs.gov A SIOSEIS script was used to stack the RP gathers, apply a bandpass filter and automatic gain control. The process DISKIN read the RP sorted SEG-Y file. The process STACK was used to sum traces, compute the average amplitude for each trace sample, and write the computed samples to one trace. The trace header values of the first trace in the gather were used for the stacked trace. The process FILTER applied a zero-phase bandpass frequency domain filter between 600 and 2000 Hz with a slope of 48 decibel per octave slope. The process AGC applied an automatic gain control (AGC) with a window length of 5 ms. The computed multiplier for each AGC window was reduced by fifty percent. Lastly, the processed stacked traces were written to disk with the process DISKOX in SEG-Y rev. 1 , IEEE floating point format. 2014 A Seismic Unix script was used to read the trace headers of the stacked SEG-Y files and write RP, layback corrected X and Y, year, day, hour minute, seconds only where the original channel number was equal to one (the channel closest to the source). Some RP gathers did not contain a trace with channel one in the header and were eliminated. An AWK script was used to format the trace navigation with layback-corrected positions in a comma-delimited file (CSV). An additional script was used to parse the navigation at first, last, and every 100 reflection points, then saved as a CSV file. 2014 100-rp text files created in the previous step were concatenated into a comma-delimited text file, then imported into ArcMap (version 9.3) using 'Create Feature Class from XY Table' and saved as points (UTM Zone 18, WGS 84) in the Esri shapefile format. Additional fields for Survey ID, Device ID, and Vehicle ID were added in ArcMap. 2014 The online links to the data were updated to reflect the new server hosting the data. Additionally, other small edits could be made to the metadata, such as modifying http to https where appropriate. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. 20170419 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 USGS Thesaurus keywords added to the keyword section. 20180720 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 Added keywords section with USGS persistent identifier as theme keyword. 20200908 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 Point Entity point 10509 0.000001 0.000001 Decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 2014_002_FA_MCS_100rp MCS reflection points at 100-interval for survey 2014-002-FA along the Delmarva Peninsula U.S. Geological Survey FID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry Esri Coordinates defining the features. East Easting coordinate in UTM Zone 18 meters, WGS 84 U.S. Geological Survey 449902.41 527475.38 meters 0.01 North Northing coordinate in UTM Zone 18 meters, WGS 84 U.S. Geological Survey 4154663.29 4252176.2 meters .01 Lon Longitude coordinate in decimal degrees, WGS 84 U.S. Geological Survey -75.567453 -74.685475 degrees .00001 Lat Latitude coordinate in decimal degrees, WGS 84 U.S. Geological Survey 37.538758 38.417831 degrees .00001 Line Name of seismic data file U.S. Geological Survey String up to 254 characters Year Calendar year data were collected U.S. Geological Survey 2014 2014 years 1 JD Julian day data were collected (Julian day is the integer number representing the interval of time in days since January 1 of the year) U.S. Geological Survey 169 178 days 1 RP Reflection point number (first, last, and every 100 RPs between) U.S. Geological Survey 97 25582 reflection point 1 Survey_ID WHCMSC field activity identifier (e.g. "2014-002-FA" where 2014 is the survey year, 002 is survey number of that year, and FA is Field Activity) U.S. Geological Survey String up to 254 characters Vehicle_ID Survey vessel name U.S. Geological Survey String up to 254 characters Device_ID Sonar device used to collect seismic-reflection data U.S. Geological Survey String up to 254 characters The PNG seismic reflection images can be hyperlinked to their trackline location in ArcGIS. The 100 reflection point intervals correspond to the x-axis ticks on the PNG images. U.S. Geological Survey Elizabeth A. Pendleton U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2259 (508) 457-2310 ependleton@usgs.gov USGS data release 2014-002-FA MCS reflection points from the Delmarva Peninsula area (2014-002-FA_MCSrps.zip). The zip file contains a shapefile with reflection points for 85 seismic lines, a browse graphic (MCS_image.png) and FGDC CSDGM metadata files (2014_002_FA_MCS_100rp.xml) in four standard formats are also included in the zip file. Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Shapefile ArcGIS 9.3 Shapefile WinZip (v 14.5) file contains a shapefile and CSV file of multi-channel streamer seismic reflection point locations collected by the U.S. Geological Survey - Woods Hole Coastal and Marine Science Center along the Delmarva Peninsula, MD and VA and the associated metadata. use WinZip or pkUnzip 52 https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/data/seismics/tracks/2014-002-FA_MCSrps.zip https://cmgds.marine.usgs.gov/data/field-activity-data/2014-002-FA/ https://doi.org/10.5066/F7MW2F60 Data can be downloaded via the World Wide Web (WWW) none This zip file contains data available in shapefile format. The user must have software capable of reading and processing the data file. 20240318 Elizabeth Pendleton U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Rd.

Woods Hole MA 02543-1598 (508) 548-8700x2259 (508) 457-2310 whsc_data_contact@usgs.gov The metadata contact email address is a generic address in the event the person is no longer with USGS. (updated on 20240318) FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None None