Accession Number : AD0775900

Title :   Surface and Bottom Magnetic Survey in the Area of the Bermuda Rise,


Personal Author(s) : Alers,P. B. ; Bergin,J. M. ; Greenewalt,D.

Report Date : 21 DEC 1973

Pagination or Media Count : 37

Abstract : A shipborne investigation of sea-floor magnetism was carried out in the three Marsden squares immediately west of Bermuda in November 1972. Both deep and surface magnetometers were used. The deep record was examined for the presence of short-wavelength (<5 km) geological anomalies; none were found. The bottom record was mathematically scaled to the surface and was found to be consistent with the surface record. The surface data were filtered to separate various noise components, and wave noise, geomagnetic noise, and geological noise sources were all identified. The upward continuation results, a magnetic chart of the area, and field data along representative tracks, together with spectra of peak height vs wavelength, were all derived. A detailed discussion of two different filter techniques is included as an appendix. (Author)

Descriptors :   *Geomagnetism, *North Atlantic Ocean, Ocean bottom, Magnetic anomalies

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE