A comparative study of K-indices at three Indian Magnetic stations

Authors

  • G. K. RANGARAJAN Indian Institute of Geomagnetism, Colaba, Bombay

DOI:

https://doi.org/10.54302/mausam.v31i3.3793

Abstract

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.

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Published

01-07-1980

How to Cite

[1]
G. K. RANGARAJAN, “A comparative study of K-indices at three Indian Magnetic stations ”, MAUSAM, vol. 31, no. 3, pp. 449–456, Jul. 1980.

Issue

Vol. 31 No. 3 (1980): MAUSAM

Section

Shorter Contribution

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