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Title: Some characteristics of the 13 March 1989 magnetic storm in the American and the Indian longitude zones
Authors: Mukherjee, G K
Issue Date: Dec-1994
Publisher: NISCAIR-CSIR, India
Abstract: Several Characteristic features of the giant magnetic storm of 13 Mar. 1989 (Kp = 60, Ap = 246) have been brought out from the ground-based magnetometer data (H, D and Z) of several low to high latitude stations situated in the American and the Indian zones. SSC (storm sudden commencement) amplitudes and ranges between maxima and minima in all the three geomagnetic components have been compared. The SSC excursions are in opposite directions in H, D and Z components a the two conjugate stations, positive at Iqaluit (63.8°N, 291.5°E) and negative at South Pole station (90°S). At a mid-latitude station, Tuckerton (39.6°N, 76.33°W), the SSC amplitudes n H, D and Z maximize in the American sector. However, in the Indian zone SSC amplitudes maximize at Sabhawala (30.33°N, 77.8°E) for H and Z components and excursion in H is maximum (~883 nT) at the equatorial station, Kodaikanal (10.23°N, 77.47°E). Equivalent current plots have also been drawn to compare the magnetic disturbance over the two zones and to study the general evolution of the storm.
Page(s): 393-398
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.23(6) [December 1994]

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