Open AccessA comparative study of K-indices at three Indian Magnetic stations
Author(s) -
Govindan Rangarajan
Publication year - 1980
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v31i3.3793
Subject(s) - earth's magnetic field , index (typography) , mathematics , statistics , atmospheric sciences , physics , meteorology , magnetic field , computer science , quantum mechanics , world wide web
Indices K of geomagnetic activity scaled from magnetograms of Alibag, Hyderabad and Sabhawala are mutually compared and individually with planetary index Kp to bring out the salient features of their occurrence frequencies. The main results of the analysis are :
(a) Distributions of occurrence frequency for the three stations differ from each other and from that of Kp, especially with respect to peak occurrence.
(b) K = 0 is reckoned least at Alibag.
(c) K—indices of Sabhawala do not confirm exactly to the expected pattern. This could mainly due to improper elimination of regular variations.
(d) In relation to Alibag, K > 2 at Hyderabad are reckoned more often whereas at Sabhawala the bias is towards less frequency.
(e) Study of persistence of geomagnetic activity shows that a high value of K-index is not always followed by the same value. But adjacent values (K ± 1) together indicate a significant probability of occurrence.