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Kumar, Santosh; Chauhan, M. L.; Dubey, S. K.

doi:10.1023/a:1004930112421

Cited by 17 publications

(13 citation statements)

References 8 publications

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“…2 that the amplitude of the semi-diurnal anisotropy for each HAE remains statistically the same; whereas, the phase has shifted to later hours. Which is in good agreement with earlier results (Kumar and Chauhan, 1996;Kumar et al, 1997). The Bz component of IMF is observed to remain +ve i.e.…”

Section: Resultssupporting

confidence: 93%

“…The amplitude of semi-diurnal anisotropy remains statistically invariant, whereas, phase has shifted to later hours for both types of events. This confirms the trends (Kumar and Chauhan, 1996a,b;Kumar et al, 1997) reported earlier in this regard.…”

Section: Resultssupporting

confidence: 93%

“…However, it is also observed that for some of the HAEs it shifts towards earlier hours. This is in partial agreement with earlier findings (Kumar and Chauhan, 1996a;Kumar et al, 1997) where they noticed that the phase shifted towards later hours for some of the HAE, whereas it remains in the 18-h direction for majority of the HAE events during the period 1981-1990. The Bz component of IMF is observed to remain positive i.e.…”

Section: Resultssupporting

confidence: 93%

“…It is evident from these plots that amplitude of the semi-diurnal anisotropy remains statistically the same for all LAEs; whereas, the phase is shifted to later hours. Similar results have been observed by Jadhav et al (1983) for the period 1966-1973 and Kumar and Chauhan (1996b) and Kumar et al (1997) for the period 1981-1990. The Bz component of IMF is observed to remain positive i.e.…”

Section: Resultssupporting

confidence: 91%

“…It has been found that the amplitude of the diurnal anisotropy for majority of the LAE events attains significantly lower values as compared to the quiet day annual average amplitude throughout the period and the phase of the diurnal anisotropy has a tendency to shift towards earlier hours as compared to the quiet day annual average value for majority of the LAEs. Similar results have been reported by Kumar and Chauhan (1996a) and Kumar et al (1997) for the period 1981-1990. Further, the amplitude and phase of the semi-diurnal anisotropy have been plotted in Fig. 6.…”

Section: Resultssupporting

confidence: 90%

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Characteristics of Enhanced and Low Amplitude Anisotropic Wave Trains and Interplanetary Transients

Mishra

2006

Astrophys Space Sci

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The occurrence of a large number of high and low amplitude anisotropic wave train events over the years [1981][1982][1983][1984][1985][1986][1987][1988][1989][1990][1991][1992][1993][1994] has been examined along with the different solar features. The results indicate that the time of maximum of diurnal variation significantly remains in the 18-h direction for majority of the high and low amplitude wave trains. The amplitude of diurnal anisotropy remains significantly high and phase shifts towards earlier hours as compared to the quite day annual average values for majority of the HAEs. The diurnal amplitude remains significantly low and phase shifts towards earlier hours as compared to the quiet day annual average values for majority of the LAEs. The occurrence of these enhanced/low amplitude events is found to be dominant during the positive polarity of the Bz component of the interplanetary magnetic field. The amplitude of the diurnal anisotropy of these events is found to increase on the days of magnetic cloud as compared to the days prior to the event and it found to decrease during the later period of the event as the cloud passes the Earth. The high-speed solar wind streams do not play any significant role in causing these types of events. The interplanetary disturbances (magnetic clouds) are also effective in producing cosmic ray decreases.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 90%

See 3 more Smart Citations

Characteristics of Enhanced and Low Amplitude Anisotropic Wave Trains and Interplanetary Transients

Mishra

2006

Astrophys Space Sci

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Unusually low-amplitude anisotropic wave-train events of cosmic ray intensity during 1981–1994

Mishra

Mishra²

2005

Pramana - J Phys

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Harmonics of exceptionaly low amplitude anisotropic wave train events in cosmic ray intensity

Mishra

2007

Astrophysics

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The unusually low amplitude anisotropic wave train events (LAEs) in cosmic ray intensity using the ground based Deep River neutron monitor data has been studied during the period 1991-94. It has been observed that the phase of the diurnal anisotropy for the majority of the LAE events remains in the co-rotational direction. However, for some of the LAE events the phase of the diurnal anisotropy shifts towards earlier hours as compared to the annual average values. On the other hand, the amplitude of the semi-diurnal anisotropy remains statistically the same, whereas phase shift-towards later hours; a similar trend has also been found in case of tri-diurnal anisotropy. The high-speed solar wind streams do not play a significant role in causing the LAE events. The occurrence of LAE is independent of the nature of the Bz component of IMF polarity.

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Untitled

Cited by 17 publications

References 8 publications

Characteristics of Enhanced and Low Amplitude Anisotropic Wave Trains and Interplanetary Transients

Characteristics of Enhanced and Low Amplitude Anisotropic Wave Trains and Interplanetary Transients

Unusually low-amplitude anisotropic wave-train events of cosmic ray intensity during 1981–1994

Harmonics of exceptionaly low amplitude anisotropic wave train events in cosmic ray intensity

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