1. Coastal/Marine Hazards and Resources
2. Woods Hole Coastal and Marine Science Center
3. Field activity data

Geophysical data collected along the Atlantic continental slope and rise 2014, U.S. Geological Survey Field Activity 2014-011-FA, cruise MGL1407

Suggested citation:Arsenault, M.A., Miller, N.C., Hutchinson, D.R., Baldwin, W.E., Moore, E.M., Foster, D.S., O'Brien, T.F., and Fortin, W.F., 2017, Geophysical data collected along the Atlantic continental slope and rise 2014, U.S. Geological Survey Field Activity 2014-011-FA, cruise MGL1407: U.S. Geological Survey data release, https://doi.org/10.5066/F7V69HHS.

Abstract: In summer 2014, the U.S. Geological Survey conducted a 21-day geophysical program in deep water along the Atlantic continental margin by using R/V Marcus G. Langseth (Field Activity Number 2014-011-FA). The purpose of the seismic program was to collect multichannel seismic reflection and refraction data to determine sediment thickness. These data enable the United States to delineate its Extended Continental Shelf (ECS) along the Atlantic margin. The same data can also be used to understand large submarine landslides and therefore assess their potential tsunami hazard for infrastructure and communities living along the eastern seaboard. Supporting geophysical data were collected as marine magnetic data, gravity data, 3.5-kilohertz shallow seismic reflections, multibeam echo sounder bathymetry, and multibeam backscatter. The survey was conducted from water depths of approximately 1,500 meters to abyssal seafloor depths greater than 5,000 meters. Approximately 2,761 kilometers of multi-channel seismic data was collected along with 30 sonobuoy profiles. This field program had two primary objectives: (1) to collect some of the data necessary to establish the outer limits of the U.S. Continental Shelf, or Extended Continental Shelf, as defined by Article 76 of the United Nations Convention of the Law of the Sea and (2) to study the sudden mass transport of sediments down the continental margin as submarine landslides that pose potential tsunamigenic hazards to the Atlantic and Caribbean coastal communities. For more information on the field activity, see the field activity page https://cmgds.marine.usgs.gov/fan_info.php?fan=2014-011-FA

Filename and description	Preview	Metadata	Download
Geophysics
2014-011-FA_mag Marine magnetics data collected by the USGS on the R/V Marcus G. Langseth, in 2014 (Geographic, WGS 84, Esri point shapefile, ascii text, and PDF file formats)		HTML TEXT XML	2014-011-FA_mag.zip (2.64 MB)
Seismics
2014-011-FA_mcscmp Common mid- point navigation for SEG-Y data collected by the USGS on the R/V Marcus G. Langseth, in 2014 (Geographic, WGS 84, Esri point shapefile and CSV file formats)		HTML TEXT XML	2014-011-FA_mcscmp.zip (15.30 MB)
2014-011-FA_seistrk Survey tracklines of multi-channel seismic data collected by the USGS on the R/V Marcus G. Langseth, in 2014 (Geographic, WGS 84, Esri polyline shapefile file format)		HTML TEXT XML	2014-011-FA_seistrk.zip (3.70 MB)
2014-011-FA_poststmsegy Multi-channel seismic data collected by the USGS on the R/V Marcus G. Langseth, in 2014 (SEG-Y format)		HTML TEXT XML	2014-011-FA_segy (10.30 GB)