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Solar Activity Dependence of Interplanetary Disturbances

Published online by Cambridge University Press:  12 April 2016

P.K. Manoharan
P.K. Manoharan*
Affiliation:
Radio Astronomy Centre (TIFR), P.O. Box - 8, Ooty - 643001, India

Abstract

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Interplanetary scintillation measurements obtained inside 200 R⊙ using the Ooty Radio Telescope during August 1986 - April 1991 have been analysed to study the interplanetary disturbances (or events) and their occurrence rates at various phases of the solar cycle. The disturbances are identified by the increase in the level of scintillation compared with the expected value. In total, 735 events have been identified. The results show a rate of 0.49 events per day near solar maximum and a low rate of 0.16 events per day during minimum of activity. The results are compared with coronal mass ejection (CME) rates and transients rates obtained from the Doppler scintillation measurements.

Type
IPS and Other Remote Sensing Measurements
Information
International Astronomical Union Colloquium , Volume 154: Solar and Interplanetary Transients , 1996 , pp. 221 - 224
Copyright
Copyright © Kluwer 1997

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