Accession Number : AD0437332

Title :   SUB ELF GEOMAGNETIC FLUCTUATIONS. VOLUME I. FREQUENCY-TIME CHARACTERISTICS OF HYDROMAGNETIC EMISSIONS.

Descriptive Note : Final rept.,

Corporate Author : LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF

Personal Author(s) : Tepley,Lee ; Wentworth,R. C. ; Amundsen,K. D.

Report Date : 26 DEC 1963

Pagination or Media Count : 10

Abstract : Results are presented of recent measurements of hydromagnetic emissions at four Pacific Ocean stations widely separated in both latitude and longitude. The signals are almost always observed simultaneously at the four locations. The repetition frequency of the emission fine structure is found to be highly regular and is the same at all stations for any given hm emission event. The structural elements are observed simultaneously at stations in the same hemisphere, but the elements are found to be alternately spaced (180 out of phase) in emissions observed simultaneously at stations on opposite sides of the equator. Hence, energy is being received periodically and alternately in the northern and southern hemisphers. The result is applied to the evaluation of three recently proposed models for the generation of hm emissions; two of the three models are immmediately rejected. It is also observed on occasion that the fine-structure repetition-frequency ehibits the presence of a harmonic. The effect, referred to as 'structure-doubling; is tentatively interpreted as resulting from a super-position of signals from opposite hemispheres. (Author)

Descriptors :   (*GEOMAGNETISM, MEASUREMENT), MAGNETOMETERS, EXTREMELY LOW FREQUENCY, PACIFIC OCEAN, MAGNETIC STORMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE