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USGS Coastal and Marine Geology Program

Field Activity Details for field activity 2018-642-FA

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AKA: none

Other ID: 2018 Cascadia Margin Mapping; H13117; H13118; H13119; H13206; H13137

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Other (Other)

Principal Investigator(s): Janet Watt

Affiliate Investigator(s): Paul Turner, NOAA

Information Specialist(s): Peter Dartnell

Data Type(s): Location-Elevation: Navigation, Sonar: Multibeam

Scientific Purpose/Goals: Collect multibeam, backscatter, and water column data along the slope of the Cascadia margin to fill in gaps in hi-resolution multibeam imagery for subduction zone hazard characterization

Vehicle(s): None

Start Port/Location: Seattle, WA

End Port/Location: San Franciscoo, CA

Start Date: 2018-07-31

End Date: 2018-08-23

Equipment Used: navigation, multibeam

Information to be Derived: multibeam bathymetry, backscatter, and water column data

Summary of Activity and Data Gathered: Cruise_Backup, Cruise_Reports, GIS_FINAL_GRIDS_cruise, GIS_for_cruise data on FAD 9/17/2018


Affiliate Staff:

Notes: NOAA will be the primary data repository for this data.
This is a collaborative effort between NOAA and USGS, using NOAA's ship Rainier. OE Funding for this work is coming directly from the CMG Program. Salary support is coming from the Cascadia Task of the Marine Hazards Project.


central and southern Cascadia margin

North: 46.59242377 South: 40.40495725 West: -127.04100963 East: -124.01203827




Conrad, J.E., and Rudebusch, J.A., 2023, Methane seep locations derived from water-column acoustic backscatter data collected along Cascadia margin offshore Oregon and Northern California, 2018-2021: U.S. Geological Survey data release,

Dartnell, P., Conrad, J.E., Watt, J.T., and Hill, J.C., 2021, Composite multibeam bathymetry surface and data sources of the southern Cascadia Margin offshore Oregon and northern California: U.S. Geological Survey data release,


Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
navigation --- Navigation
multibeam --- Multibeam

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