Accession Number : AD0629087

Title :   SOME SPECTRAL CHARACTERISTICS OF GEOMAGNETIC VIBRATIONS.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY SPACE SCIENCES LAB

Personal Author(s) : Zelwer,Ruben

Report Date : 31 JAN 1966

Pagination or Media Count : 148

Abstract : Standard Magnetograms of 14 stations distributed around the world were analyzed by means of a running power spectrum technique in an attempt to detect what may be interpreted as changes in the state of the magnetosphere from the shift of the frequency peaks of the power spectrum analyses. The event chosen was the magnetic storm of October 7, 1962, at which time the Mariner II spacecraft was on its way to Venus. The results show that the technique used is not very appropriate for the objective, for the presence of an important event of large amplitude on the data, even if it is of a very short duration, will greatly determine the character of the power spectrum. It is shown that the phenomenon is of world wide nature as detected from the technique used, but no conclusions can be drawn from the geographic distribution of occurrence of the spectral peaks. The work also includes a survey of the power spectrum analysis techniques as well as the results of some spectral computation experiments. (Author)

Descriptors :   (*GEOMAGNETISM, OSCILLATION), SOLAR DISTURBANCES, IONOSPHERIC DISTURBANCES, MAGNETIC STORMS, MAGNETOHYDRODYNAMICS, GEOPHYSICS

Subject Categories : Astrophysics
      Atmospheric Physics
      Geomagnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE