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http://hdl.handle.net/2248/4957
Title: | Sudden commencements and impulses in Kodaikanal magnetograms - their hourly frequency |
Authors: | Murthy, B. S |
Keywords: | Impulses in Kodaikanal Magnetograms Sudden Commencements (SCs) Sudden Impulses (SIs) Harmonic Analysis Storm Sudden Commencements (SSCs) |
Issue Date: | Apr-1959 |
Publisher: | Manager of Publications Civil Lines Delhi |
Citation: | Indian Journal of Meteorology and Geophysics, Vol. 10, No. 2, pp. 209 - 212 |
Abstract: | The diurnal variation in the frequencies of sudden commencements (SCs) and sudden impulses (SIs) at Kodaikanal (10.2°N, 77.5°E) is analysed from the data for the period 1949-1957. The hourly frequency curve of SCs and SIs (combined) has little resemblance to the curve obtained by Newton from his analysis of Green-wich-Abinger records. The results of harmonic analysis show a nearly semi-diurnal trend in the distribution of storm sudden commencements (SSCs); this, however, is small. The hourly frequencies of SIs show a significant diurnal variation with an afternoon maximum and a forenoon minimum and a secondary minimum around 18h local time and a secondary maximum around 08h. These results are also compared with those obtained by Ferraro Parkinson and Unthank. |
Description: | Open Access |
URI: | http://hdl.handle.net/2248/4957 |
ISSN: | 0019-5383 |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Sudden commencements and impulses in Kodaikanal magnetograms... | Open Access | 155.17 kB | Adobe PDF | ![]() View/Open |
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