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dc.contributor.authorHessler, V. P.
dc.contributor.authorWescott, E. M.
dc.description.abstractAn unusual type of earth-current variation is regularly observed in the College records. The phenomena consist of more or less regular fluctuations with range from a few mv/km to more than 1000 mv/km, and periods ranging upwards from 6 seconds. The fluctuations may continue from a few minutes to several hours. They have a strong diurnal variation at College with a broad maximum at 0600 local time. The fluctuations also occur at a site about 100 km southeast of College, but are not observed at Barrow« Thus these rapid fluctuations display characteristics quite different from the previously classified magnetic and earth-current continuous pulsations, pc's, and train pulsations, pt's. Special equipment was devised to count and record the period of the fluctuations on a continuous basis. Typical rapid, fluctuation, traces.and charts showing their activity patterns are presented.en_US
dc.description.sponsorshipThis research is sponsored by the Geophysics Research Directorate, Air Force Cambridge Research Center, Air Research and Development Command under Contract No. AF 19(604)-3075 and by a grant from the National Science Foundation.en_US
dc.description.tableofcontentsAbstract -- Introduction -- Equipment : Geographic location of electrode field ; Stray electric fields ; Electrodes ; Lines ; Recorders ; Cycle counting equipment -- Records and Scaling : Rapid fluctuation records ; Rapid fluctuation at College - selected days ; Rapid fluctuation activity - February 1958 -- Diurnal variation in rapid fluctuation -- Diurnal variation in amplitude and frequency activity ; Rapid fluctuation frequency and period ; Rapid fluctuations at College and at Barrow -- Discussion : Comparison of earth-current rapid fluctuations with geomagnetic pulsations ; Comparison with other earth-current pulsation studies ; Diurnal Variation in amplitude and fluctuation frequency activity at College ; Generation of earth-current rapid fluctuation -- Summary -- Bibliography -- Figuresen_US
dc.publisherGeophysical Institute at the University of Alaskaen_US
dc.sourceGeophysical Instituteen_US
dc.titleRapid Fluctuations in Earth-Currents at Collegeen_US

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