|2019 Cascadia Margin Mapping; W00474; W00475
|Collect multibeam bathymetry, acoustic-backscatter, water-column backscatter, and magnetics data along the slope of the Cascadia margin to fill in gaps in hi-resolution multibeam imagery for subduction zone hazard characterization
|central and southern Cascadia margin
|Bathymetry, backscatter, water-column, and magnetics data collected were collected offshore Coos bay and in the eel basin
|bathymetry, acoustic-backscatter, water-column backscatter, magnetics
Grand Caravan G41-1761S
2885 Mission Street
Santa Cruz, CA95060
|Peter DartnellJames E ConradJanet Tilden Watt
|Electro-Magnetic, Location-Elevation, Sonar
|Magnetics, Navigation, Multibeam
|G-882 marine magnetometer was towed behind the vessel and collected total field magnetic data during the cruise
|(no data reported)
|Collected multibeam, backscatter, and water column data
|Pos-mv used for multibeam data
|(no data expected)
|Methane seep locations derived from water-column acoustic backscatter data collected along Cascadia Margin offshore Oregon and Northern California, 2018-2021
|This dataset contains the locations of 902 methane cold seeps that were detected in acoustic water-column backscatter collected by the U.S. Geological Survey between 2018 to 2021. Rising bubbles emitting from methane seeps on the seafloor can be detected acoustically with multibeam echo sounding sonar used to collected seafloor bathymetric mapping data, which the USGS and NOAA have cooperatively collected along the Cascadia Margin offshore of northern California and Oregon for several years.
|James E Conrad
|Composite multibeam bathymetry surface of the southern Cascadia Margin offshore Oregon and northern California
|Data from various sources, including 2018 and 2019 multibeam bathymetry data collected by the National Oceanic and Atmospheric Administration (NOAA) and the U.S. Geological Survey (USGS) were combined to create a composite 30-m resolution multibeam bathymetry surface of southern Cascadia Margin offshore Oregon and northern California. The data are available as a geoTIFF file.
|Polygon shapefile of data sources used to create a composite multibeam bathymetry surface of the southern Cascadia Margin offshore Oregon and northern California
|This polygon shapefile describes the data sources used to create a composite 30-m resolution multibeam bathymetry surface of southern Cascadia Margin offshore Oregon and northern California.