Southern extent of Aurora Borealis in North America
作者:
C. W. Gartlein,
R. K. Moore,
期刊:
Journal of Geophysical Research
(WILEY Available online 1951)
卷期:
Volume 56,
issue 1
页码: 85-96
ISSN:0148-0227
年代: 1951
DOI:10.1029/JZ056i001p00085
数据来源: WILEY
摘要:
Results are presented for the first 11 years of a study of the frequency of overhead auroras in North America as a function of latitude in a region south of the auroral zone. The data have been averaged in various ways so that monthly and annual variations are demonstrated. It appears that there is a relatively constant level of auroral activity throughout the year in the region 58° to 60° geomagnetic latitude, while auroras appearing overhead south of these latitudes are more frequent during equinoctial periods. Auroras have been seen as far south as 52° during this period every month of the year. Correlation of auroral frequency with sunspot number is not high on a month‐by‐month or three‐month running‐
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