Larry Poppe 2009 SEG-Y and JPEG Open-File Report 2009-1001 Woods Hole Coastal and Marine Science Center, Woods Hole, MA U.S. Geological Survey, Coastal and Marine Geology Program https://doi.org/10.3133/ofr20091001 https://pubs.usgs.gov/of/2009/1001/html/catalog.html https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/segy/ https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/jpeg_files/ L.J. Poppe K.Y. McMullen D.S. Foster D.S. Blackwood S.J. Williams S.D. Ackerman M.S. Moser K.A. Glomb 2010 1.0 Open-File Report 2009-1001 Reston, VA U.S. Geological Survey https://pubs.usgs.gov/of/2009/1001/ The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and the Massachusetts Office of Coastal Zone Management (MA CZM), is producing detailed geologic maps of the coastal sea floor. Imagery, originally collected by NOAA for charting purposes, provides a fundamental framework for research and management activities along this part of the Massachusetts coastline, shows the composition and terrain of the seabed, and provides information on sediment transport and benthic habitat. Interpretive data layers were derived from multibeam echo-sounder and sidescan-sonar data collected in the vicinity of Edgartown Harbor, Massachusetts. During August 2008 seismic-reflection profiles (Boomer and Chirp) were acquired, and during September 2008 bottom photographs and surficial sediment data were acquired as part of two ground-truth reconnaissance surveys. To release the Chirp seismic profiles collected to ground-truth acoustic data (single-beam and multibeam bathymetry and sidescan sonar imagery) collected during NOAA hydrographic survey H11346. The Chirp data were collected to interpret the shallower stratigraphy beneath Edgartown Harbor. For more information on the seismic surveys see https://cmgds.marine.usgs.gov/fan_info.php?fan=2008-034-FA These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean ( http://www.virtualocean.org/) earth science exploration and visualization applications. 20080819 20080820 ground condition Complete None planned -70.550201 -70.432541 41.444981 41.385845 USGS Metadata Identifier USGS:0540bff7-e962-4a44-94ee-4726f3ecc6dd None U.S. Geological Survey USGS USGS Woods Hole Coastal and Marine Science Center WHCMSC Coastal and Marine Geology Program CMGP RV Rafael SEG-Y format high-resolution seismic-reflection seismic profiles subbottom Knudsen Engineering Limited (KEL) Chirp 3200 Field Activity Number 08034 Open-File Report 2009-1001 OFR 2009-1001 JPEG format segy Chirp ISO 19115 Topic Category location oceans imageryBaseMapsEarthCover geoscientificInformation Data Categories for Marine Planning distributions substrate Marine Realms Information Bank (MRIB) Keywords seismic reflection profiling marine geophysics USGS Thesaurus seismic reflection methods sub-bottom profiling marine geophysics None Cape Cod Massachusetts Nantucket Sound northeast United States North America Atlantic Ocean Edgartown Edgartown Harbor Martha's Vineyard 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 (USGS) as the source of this information. Larry Poppe U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2314 508-457-2310 lpoppe@usgs.gov https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0003_2008_232_0951_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0004_2008_232_1020_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0005_2008_232_1029_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0006_2008_232_1053_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0007_2008_232_1110_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0008_2008_232_1146_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0009_2008_232_1228_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0010_2008_232_1247_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0011_2008_232_1303_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0012_2008_232_1330_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0013_2008_232_1339_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0014_2008_232_1439_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0015_2008_232_1449_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0016_2008_233_0923_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0017_2008_233_0940_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/gif_files/0018_2008_233_0950_3.5kHz.gif Browse graphic showing chirp high-resolution seismic-reflection profiles collected during RV Rafael cruise 08034. GIF Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.6.1500 C.J. O'Hara R.N. Oldale 1987 1.0 Miscellaneous Field Studies Map MF-1911 Reston, VA U.S. Geological Survey https://pubs.er.usgs.gov/publication/mf1911 No additional checks for consistency were performed on this data. All available profile data along seismic acquisition lines collected during the RV Rafael cruise 08034 is included in this data set except for the first two files were omitted from the processing. These files only contain a few seconds of data. Horizontal_Positional_Accuracy_Report: Navigation was by DGPS; positional accuracy to less than 10 m. The 3.5 kHz transducer was mounted on a pole on the starboard side of the RV Rafael 0.6 m below the water surface. The vertical position was local sea level and there have been no corrections to a datum or for tidal variations. High-resolution 3.5 kHz Chirp data were collected August 19-20 aboard the Research Vessel Rafael. The Chirp data were acquired digitally along 16 lines totaling approximately 56.1 km with a Knudsen Engineering Limited (KEL) Chirp 3200 shallow water system and KEL Sounder Suite software. The Chirp trace data recorded with a ping rate of 0.5 seconds for 66 ms with a sample rate of 0.048 ms in standard SEG-Y format. 20080820 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@usgs.gov The raw SEG-Y data were read into Promax R2003 processing software. Heave compensation data from the Teledyne TSS sensor (mounted on the transducer sidemount pole) were extracted from the SEG-Y headers and were used to apply a static shift to the trace data. A topmute above the seas floor was digitized and applied. An AGC with a window length of 5 ms was applied. The processed data were written to a new SEG-Y file. 20081210 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@usgs.gov A Unix shell script was run that used Seismic Unix v4.0 to read the SEG-Y files and plot the data as 8-bit gray scale Postscript files using the Seismic Unix 'psimage' algorithm at a scale of 4.16 ms per inch and 100 traces per inch. The Postscript images were then converted to JPEG format with Imagemagick 5.5.6 20081210 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 508-457-2310 dfoster@noaa.gov Edits to the metadata were made to fix any errors that MP v 2.9.36 flagged. This is necessary to enable the metadata to be successfully harvested for various data catalogs. In some cases, this meant adding text "Information unavailable" or "Information unavailable from original metadata" for those required fields that were left blank. Other minor edits were probably performed (title, publisher, publication place, etc.). Attempted to modify http to https where appropriate. Added an online linke for a cross-reference. The source information only contained a date, so was deleted. The geographic coordinate units were listed as seconds of arc, which violates the standard. The value was changed to decimal degrees. The assumption is that seconds of arc refers to information in the SEG-Y header. Added a digital form so that the JPEG and SEG-Y each had a section. The metadata date (but not the metadata creator) was edited to reflect the date of these changes. The metadata available from a harvester may supersede metadata bundled within a download file. Compare the metadata dates to determine which metadata file is most recent. 20170207 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 Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. 20171203 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Supplemental information was added, as well as more information in the distribution to provide another source of where to get the SEG-Y data. 20171204 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 Crossref DOI link was added as the first link in the metadata. 20191118 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 Raster 0.000003 0.000003 decimal degrees D_WGS_1984 WGS_1984 6378137.000000 298.257224 Local surface 0.001 milliseconds Implicit coordinate This data set includes 3.5-kHz Chirp seismic-reflection data in SEG-Y and JPEG formats collected along 17 lines in the vicinity of Edgartown, offshore Massachusetts. The seismic data were collected during USGS survey 08034, conducted August 18-20, 2008. Each profile is available as a binary file in Society of Exploration Geophysicists SEG-Y rev 1 format and JPEG image format. A SEG-Y file consists of 1) a 3200-byte file identification record of EBCDIC encoded general information; 2) a 400-byte binary record with information such as sample rate and record length specific to the data set; and 3) multiple records, one seismic reflection trace per record. Each trace record is preceded by a 240-byte "trace header" containing information such as trace number and acquisition day and time specific to each trace. The trace data are represented as a time series of unitless 32-bit IEEE real numbers proportional to the reflection coefficient. The SEG-Y file is useful only if you have access to specialized software designed to process and display seismic reflection data. **In the original metadata, the Geographic_Coordinate_Units were listed as seconds of arc, which violates the standard. The assumption is that seconds of arc refers to information in the SEG-Y header. http://www.seg.org/documents/10161/77915/seg_y_rev1.pdf Larry Poppe U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2314 508-457-2310 lpoppe@usgs.gov Downloadable Data Neither the U.S. Government, the Department of the Interior, nor the USGS, nor the National Oceanic and Atmospheric Administration (NOAA), 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 or NOAA 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. JPEG Information unavailable from original metadata. Joint Photographic Experts Group image https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/jpeg_files/ https://pubs.usgs.gov/of/2009/1001/html/catalog.html Data are downloadable via the World Wide Web (WWW) DVD 4.7 Gbytes UDF SEG-Y 1 SEG-Y rev. 1 https://pubs.usgs.gov/of/2009/1001/data/seismic/kel/segy/ https://pubs.usgs.gov/of/2009/1001/html/catalog.html https://cmgds.marine.usgs.gov/data/2008_034_FA_c/ Data are downloadable via the World Wide Web (WWW). The third link is another source of the SEG-Y data and may not be exactly the same as the data available from the first online link. DVD 4.7 Gbytes UDF none Use of SEG-Y data requires specialized software capable of reading SEG-Y standard files. The user must have software capable of viewing standard JPEG files. 2009 20240318 David Foster U.S. Geological Survey Geologist mailing and physical address

384 Woods Hole Road

Woods Hole MA 02543 USA 508-548-8700 x2271 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