Accession Number : AD0621459

Title :   ON THE SMALL AMPLITUDE OF MAGNETIC SECULAR CHANGE IN THE PACIFIC AREA,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Vestine,E. H. ; Kahle,Anne B.

Report Date : AUG 1965

Pagination or Media Count : 12

Abstract : It has been suggested that toroidal fields in the earth's fluid metallic core are brought to the surface to provide changes with time in the geomagnetic field. The centers of secular change thereby produced then drift slowly westward. If there is a downflow of fluid the secular change pattern may then be reduced in intensity relative to those regions experiencing an upflow. Data on the geomagnetic field (1912-1955) are used to show that such a downflow is probable in the Pacific region. This may provide an unforced explanation for the small amplitude in secular change long observed in the Pacific. (Author)

Descriptors :   (*GEOMAGNETISM, PACIFIC OCEAN), (*MARINE GEOPHYSICS, GEOMAGNETISM), MAGNETIC FIELDS, OSCILLATION, GEOPHYSICS, GEOLOGY, OCEANOGRAPHY

Distribution Statement : APPROVED FOR PUBLIC RELEASE