Field Activity Details for field activity R194NC

AKA: none

Other ID: R-1-94-NC

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center, National Oceanic and Atmospheric Administration

Funding Program(s): Cape Mendocino 1992 Earthquake Study (MU036)

Principal Investigator(s): Sam Clarke

Affiliate Investigator(s):

Information Specialist(s):

Data Type(s): Sonar: Single Beam, Sonar: Sound Velocity, Location-Elevation: Navigation

Scientific Purpose/Goals: A 1:20,000 scale reconnaissance survey was conducted for the USGS in the vicinity of Cape Mendocino, California, to analyze seafloor uplift caused by the 1992 earthquake.

Vehicle(s):

Start Port/Location:

End Port/Location:

Start Date: 1994-04-20

End Date: 1994-04-20

Equipment Used: echosounder, soundvelocityprofiler, GPS

Information to be Derived:

Summary of Activity and Data Gathered: During the transit south to the working grounds the weather conditions, 5 to 7 m swells and 40 to 60 knot winds, prevented this survey from being conducted. The three desired tracks were completed on the transit north with the following conditions, 1 to 3 m swells and 5 to 15 knot winds. All data was acquired in Universal Coordinated Time. Soundintgs were taken in meters with a Raytheon DSF-6000N echosounder (S/N B0044N) with the following correctors applied: static draft, settlement, and squat, sound velocity, and tides. A velocity cast was taken on April 20 and the correctors calculated to 853 meters. the tide correctors were figured on San Francisco for Cape Mendocino applying the following correctors: Time High -28m, Low +01m, Height High -0.1ft, Low 0.0ft. The survey was controlled by non-differential GPS which due to dithering, has a positional accuracy radius of 100 meters. NAD83 was the horizontal datum used for this survey. The shoreline was transferred from an enlargement of NOS chart 18623 10th edition, April 14, 1994 and is for orientation purposes only.

Staff:

Affiliate Staff:
Russell C. Arnold (NOAA) - Ship Captain

Notes:

Staff information imported from InfoBank
Russell C. Arnold (NOAA) - Ship Captain

Location:

CA

Platform(s):

Publications

Portals/Viewers

Data Acquired