On the non‐simultaneity of magnetic storms
1922; Volume: 27; Issue: 4 Linguagem: Inglês
10.1029/te027i004p00161
ISSN2379-5697
Autores Tópico(s)Scientific Research and Discoveries
ResumoDr. Bauer in a study based chiefly on data collected by Faris, reached the conclusion that “magnetic storms do not begin at precisely the same instant all over the Earth.” The abruptly beginning ones, investigated by him, appeared to progress more often towards the east than towards the west, with a velocity such that it would require, on the average, about four minutes to encircle the Earth at the equator. 1 I should like to call attention to the fact that in the case of five well‐defined storms which occurred subsequent to those examined by Bauer, namely, those of January, February and May, 1919, March, 1920, and May, 1921, I have found a simultaneous beginning at Tortosa and at Honolulu, which lies 158 degrees to the west, within the limits of measurement. The photographic paper at Tortosa runs at the rate of 2.8 minutes to the millimeter and the base line is shown every hour by an electric lamp in connection with the astronomical clock, hence, I do not think we can be in error by a minute. The measures for each storm were accurately made by the writer, and the corresponding times of the beginning as registered at the other stations were kindly communicated to me by Col. E. Lester Jones, director of the U. S. Coast and Geodetic Survey, at Washington, and by Capt. R. L. Faris, acting director. 2
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