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    Rapid Fluctuations in Earth-Currents at College

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    GI Reports 87.pdf
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    Author
    Hessler, V. P.
    Wescott, E. M.
    Metadata
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    URI
    http://hdl.handle.net/11122/3552
    Abstract
    An 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.
    Table of Contents
    Abstract -- 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 -- Figures
    Date
    1959-01
    Source
    Geophysical Institute
    Publisher
    Geophysical Institute at the University of Alaska
    Type
    Report
    Peer-Reviewed
    Yes
    Collections
    GI Reports

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