Interplanetary transients causing unusual anisotropic wave trains in CR intensity

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Astronomy and Astrophysics
1Mishra, RK, 2Mishra, RA
1Computer and IT Section, Tropical Forest Research Institute, P. O. RFRC, Mandla Road, Jabalpur (M. P.) 482 021, India
2Department of Physics, Govt. Model Science College (Autonomous), Jabalpur (M. P.) 482 001, India
Kosm. nauka tehnol. 2006, 12 ;(5-6):079-086
https://doi.org/10.15407/knit2006.05.079
Publication Language: English
Abstract: 
The study deals with short-term variations of cosmic ray intensity during the interval from 1991 to 1994. The occurrence of a large number of high and low amplitude anisotropic wave train events (HAEs/LAEs) is examined. The correlation between these unusual anisotropic events and SWP/IMF parameters is studied to locate the possible cause responsible for occurrence of these types of events. Our results indicate that the time of maximum of diurnal variation shows a remarkable systematic shift towards earlier hours for LAE; whereas it remains in the 18-Hr direction for HAE. It is also noteworthy that the occurrence of low as well as high amplitude anisotropic wave train events is independent of nature of IMF polarity.
Keywords: correlation, plasma parameters, unusual anisotropic events
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