The Aurora of February 22


THE splendid aurora of February 22–23 began on the Pacific coast of North America on the former date, extending unusually far south in California, New Mexico, and Arizona, but did not become conspicuous on the eastern half of the continent until the day following. The earth currents affecting the telegraph lines were troublesome west of Chicago exclusively on February 22 also, not being felt east of that point until the day following. This localisation of the aurora in longitude has been noted in numerous other instances as well. An arrangement has been made to secure records of the geographical distribution of earth current disturbances on the lines of the Western Union Telegraph Company, which extend very widely over the North American continent. From what appears in the case above described, such records are likely to-prove to be of very great interest.

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