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dc.contributor.authorHessler, V. P. (Victor Peter)
dc.date.accessioned2024-09-27T00:34:54Z
dc.date.available2024-09-27T00:34:54Z
dc.date.issued1970-06
dc.identifier.urihttp://hdl.handle.net/11122/15417
dc.descriptionUAG R-212en_US
dc.description.abstractThis report presents results of scaling and analysis of telluric, magnetic and auroral data taken at Point Barrow, and on Arctic drifting stations Charlie, Arlis I and Arlis III. Scalings of hourly range in telluric current activity for Point Barrow are presented for the epoch August 1961 through December 1965. Similar scalings are presented for the 2 to 4 month data recording periods for each of the three drifting stations. Studies of the diurnal variation of telluric current activity with respect to the auroral oval show relatively good correlation. However, the differences suggest the need for more study in relating the telluric activity to the auroral activity and, perhaps, in the delineation of Akasofu’s “approximate” auroral ovals. The relative amplitude of telluric activity at College, Barrow and Charlie is in the order of 13 to 5 to 1. Normal run magnetograms are presented for about one month at each of stations Charlie and Arlis I. At Arlis I several measurements of declination were made as well as a number of measurements of total field, F. The total field measurements were made with a Rubidium vapor magnetometer. At Arlis III the Askamia variograph was equipped with a 6 in/hr chart recorder for comparison with telluric records. Simultaneous N-S, E-W, H and D traces are presented for several polar substorms. An all sky aurora camera was operated on Arlis III to provide data for the analysis of auroral arc drift and orientation with respect to the electric and magnetic disturbance vectors at the surface of the sea. Analysis of the E and H disturbance vectors generally shows the orthogonality required by the plane wave inducing field theory. However, there are marked discrepancies as predicted by Price when the scale values of the inducing field are taken into account. The telluric current in the sea is generally aligned with “systems” of auroral arcs but major differences occur. A study of the northward surge of auroral arcs in relation to the E and H vector activity was made. The E and H disturbance at the surface of the sea begins when the auroral arc arrives at the zenith, but maximum amplitude does not occur until the auroral arc reaches its most northernmost limit of travel. The arcs analyzed did not disappear over the northern horizon.en_US
dc.description.sponsorshipPrepared for Office of Naval Research, Department of the Navy, Washington, D.C.; Contract No. 3010(01), NR No. 307-261, Final Report.en_US
dc.description.tableofcontentsPersonnel -- Publications -- Acknowledgements -- Abstract -- List of illustrations -- List of tables -- 1. Introduction - 1.1. Ionospheric research on arctic drifting stations - 1.2. Review of literature - Telluric currents - Principal direction of telluric currents - Diurnal variation of telluric currents - The orientation of auroral arcs - Relative telluric current and magnetic variations -- 2. Telluric current-long period - 2.1. Instrumentation - 2.2. Hourly scaling - Barrow hourly scaling - Charlie hourly scaling - Arlis I hourly scaling - Arlis III hourly scaling - Discussion - 2.3. Direction of telluric current perturbation vector -- 3. Magnetic activity and absolute values - 3.1. Magnetograms - Charlie magnetograms - Arlis I magnetograms - Arlis III magnetograms - 3.2. Declination-Arlis I - 3.3. Magnitude of Total Field-F -- 4. Relative telluric, magnetic, and auroral activity - 4.1. Arctic drifting station Charlie, E and H activity - 4.2. Electric and magnetic disturbance vectors-Arlis III - 4.3. Orientation of auroral arcs - 4.4. Auroral arc drift -- References -- Appendix -- Distribution list.en_US
dc.language.isoen_USen_US
dc.publisherGeophysical Institute at the University of Alaska Fairbanksen_US
dc.subjectEarth currentsen_US
dc.subjectArctic regionsen_US
dc.subjectGeomagnetismen_US
dc.subjectDiurnal variationsen_US
dc.subjectAurorasen_US
dc.titleTelluric, geomagnetic, and auroral activity on Arctic drifting stations and at Pt. Barrowen_US
dc.typeReporten_US
refterms.dateFOA2024-09-27T00:34:55Z


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