One day last week a violent "magnetic storm" or disturbance of the earth's magnetic field broke out. Associated with the current high sunspot activity, the magnetic storm caused transatlantic telephone communication by short-wave radio to go haywire. Since it is the medium short-wave band which appears to suffer most from such disturbances, American Telephone & Telegraph Co. and R. C. A. Communications restored telephone traffic across the Atlantic by shifting to longer wavelengths.
For conversation across 3,000 miles of ocean some short-wave channel between 14 and 60 metres is required. A. T....
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