Southern extent of Aurora Borealis in North America
Southern extent of Aurora Borealis in North America
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北美洲北极光的南部范围
DOI：
10.1029/jz056i001p00085
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发表时间：
1951
影响因子：
--
通讯作者：
R. Moore
中科院分区：
文献类型：
--
作者：
C. W. Gartlein;R. Moore
本文介绍了前11年对北美洲头顶极光频率随极光带以南地区纬度变化的研究结果。这些数据以不同的方式进行了平均，从而显示了月度和年度变化。在地磁纬度58°到60°之间，全年极光活动似乎有一个相对恒定的水平，而出现在这些纬度以南的极光在春分期间更为频繁。在一年中的每个月里，极光都可以在最南边52°的地方看到。极光频率与太阳黑子数的相关性在逐月或三个月的滑动平均基础上不高。
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-mean basis.