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Metadata
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ID
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R-1-94-NC
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Abstract
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United States Geological Survey, Menlo Park,
California,National Oceanic and Atmospheric Administration.
Chief Scientist: Sam Clarke. Geophysical data (echosounder,
soundvelocityprofiler, GPS) of field activity R-1-94-NC in
Cape Mendocino, CA from 04/20/1994 to 04/20/1994
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Organization
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United States Geological Survey, Menlo Park, California
National Oceanic and Atmospheric Administration
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Project/Theme
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Cape Mendocino 1992 Earthquake Study
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Chief Scientist
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Sam Clarke
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Activity Type
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Geophysical
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Platform
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Rainier
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Area of Operation
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Cape Mendocino, CA
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Location map
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Bounding Coordinates
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41.75000
-125.75000 -122.25000
37.75000
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Dates
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04/20/1994 (JD 110) to 04/20/1994 (JD 110)
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Analog Materials
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list
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Index map
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Crew
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Russell C. Arnold
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Ship Captain, NOAA
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Equipment Used
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echosounder
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soundvelocityprofiler
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GPS
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Purpose
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A 1:20,000 scale reconnaissance survey was conducted for the USGS in
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the vicinity of Cape Mendocino, California, to analyze seafloor uplift caused by
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the 1992 earthquake.
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Summary
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During the transit south to the working grounds the weather conditions,
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5 to 7 m swells and 40 to 60 knot winds, prevented this survey from being
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conducted. The three desired tracks were completed on the transit north with the
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following conditions, 1 to 3 m swells and 5 to 15 knot winds. All data was
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acquired in Universal Coordinated Time. Soundintgs were taken in meters with a
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Raytheon DSF-6000N echosounder (S/N B0044N) with the following correctors
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applied: static draft, settlement, and squat, sound velocity, and tides. A
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velocity cast was taken on April 20 and the correctors calculated to 853 meters.
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the tide correctors were figured on San Francisco for Cape Mendocino applying
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the following correctors: Time High -28m, Low +01m, Height High -0.1ft, Low
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0.0ft. The survey was controlled by non-differential GPS which due to dithering,
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has a positional accuracy radius of 100 meters. NAD83 was the horizontal datum
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used for this survey. The shoreline was transferred from an enlargement of NOS
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chart 18623 10th edition, April 14, 1994 and is for orientation purposes only.
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Got Help?
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For R-1-94-NC, we would appreciate any information on -- contract, days at sea, dive count, funding, information specialist, information to be derived, kms of navigation, national plan, NGDC Info, notes, owner, ports, project number, publications, scanned materials, seismic description, station count, station description, submersible, tabulated info.
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