The effect of solar-induced earth potentials on long-haul communication systems has been observed for many years, particularly on transatlantic cable systems. Direct current excursions of over 3,000 volts, observed at the power stations of these cable systems, have led to a design goal for earth current potentials in the range of 2-3 V/mi. There are numerous observations of large dc currents on continental long-haul communication lines, particularly during the "great" geomagnetic storm of 1940.1 The shutdown of the Bell System L-4 long-haul communication system at Plano, Illinois, during the August 4, 1972 geomagnetic storm has renewed the interest of the communications community in the study of geomagnetic-induced earth currents and their effects on communication systems.
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TECHNICAL PAPER
Effects of the August 4, 1972 Magnetic Storm on Bell System Long-Haul Communication Routes Available to Purchase
C. W. Anderson
C. W. Anderson
Bell Laboratories, Whippany, New Jersey
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Paper No:
C1974-74058, pp. 1-18; 18 pages
Published Online:
March 04 1974
Citation
C. W. Anderson; March 4–8, 1974. "Effects of the August 4, 1972 Magnetic Storm on Bell System Long-Haul Communication Routes." Proceedings of the CORROSION 1974. CORROSION 1974. Chicago, IL. (pp. 1-18). AMPP. https://doi.org/10.5006/C1974-74058
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