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

Pramana ◽  
2005 ◽  
Vol 64 (2) ◽  
pp. 197-206
Author(s):  
Rajesh K. Mishra ◽  
Rekha Agarwal Mishra
Keyword(s):  
Wave Train ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Low Amplitude

Harmonics of Low Amplitude Anisotropic Wave Train Events in Cosmic Ray Intensity

2008 ◽  
Vol 103 (3-4) ◽  
pp. 89-103
Author(s):  
Rajesh K. Mishra ◽  
Rekha Agarwal
Keyword(s):  
Wave Train ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Low Amplitude

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

Astrophysics ◽  
2007 ◽  
Vol 50 (2) ◽  
pp. 254-264
Author(s):  
Rajesh K. Mishra ◽  
Rekha A. Mishra
Keyword(s):  
Wave Train ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Low Amplitude

scholarly journals Low-Amplitude Anisotropic Wave Train Events during Passage of Interplanetary Magnetic Clouds / Mazas Amplitūdas Anizotropiju Viļņu Parādību Secība Starpplanētu Magnētisko Mākoņu Rašanās Laikā

2013 ◽  
Vol 50 (2) ◽  
pp. 68-72
Author(s):  
R. Agarwal ◽  
R.K. Mishra
Keyword(s):  
Solar Wind ◽  
Wind Velocity ◽  
Solar Wind Velocity ◽  
Magnetic Cloud ◽  
Wave Train ◽  
Cosmic Ray ◽  
Magnetic Clouds ◽  
Cosmic Ray Intensity ◽  
The North ◽  
Low Amplitude

The work presents a continuation in the series related to the long-term space observations made by ground-based neutron monitoring stations. The cosmic ray intensity variation is considered as affected by interplanetary magnetic clouds during low-amplitude anisotropic wave train (LAAWT) events. It was observed that the solar wind velocity is higher than normal (> 300 km/s) while the interplanetary magnetic field (IMF) strength is lower than normal on the arrival of magnetic cloud during LAAWT events. The proton density is found to remain significantly low at high solar-wind velocity, which was expected. The north/south component of interplanetary magnetic field turns southward one day before the arrival of cloud and remains in this direction after that. The cosmic ray intensity is found to increase with the solar wind velocity. It is noteworthy that the cosmic ray intensity significantly increases before and 90 h after the arrival of such a cloud, and decreases gradually after its passage. The north/south component of IMF (Bz) is found to significantly correlate with latitude angle (Ө) and disturbance storm time index Dst, whereas the geomagnetic activity index (Ap) significantly anti-correlates with these parameters, decreasing with (Ө) and Dst increasing on the arrival of interplanetary magnetic cloud during LAAWT events.

A study of daily variation in cosmic ray intensity during high/low amplitude days

Pramana ◽  
2007 ◽  
Vol 68 (3) ◽  
pp. 407-422 ◽  
Author(s):  
Rajesh K Mishra ◽  
Rekha Agarwal Mishra
Keyword(s):  
Daily Variation ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Low Amplitude

scholarly journals Cosmic Ray Nucleonic Intensity in Low-Amplitude Days During the Passage of High-Speed Solar Wind Streams

2008 ◽  
Vol 45 (2) ◽  
pp. 61-66
Author(s):  
Rekha Agarwal ◽  
Rajesh Mishra ◽  
Sharad Tiwari
Keyword(s):  
Solar Wind ◽  
High Speed ◽  
Wave Train ◽  
Cosmic Ray ◽  
Geomagnetic Disturbances ◽  
Start Time ◽  
Plasma Parameters ◽  
Speed Solar Wind ◽  
Low Amplitude ◽  
High Speed Solar Wind

Cosmic Ray Nucleonic Intensity in Low-Amplitude Days During the Passage of High-Speed Solar Wind StreamsOne of the most striking features of solar wind is its organization into high- and low- speed streams. It is now well established that the passage over the Earth of high-speed solar wind streams leads to geomagnetic disturbances. The high-speed plasma streams are thus a key element in the complex chain of events that link geomagnetic activity to the solar activity and are therefore of great interest to the solar terrestrial physics. Two types of high-speed solar wind streams - coronal-hole-associated (or corotating) and flare-generated - were studied based on magnetic field and solar wind plasma parameters. In the work, the dependence was obtained for cosmic ray (CR) depressions due to high-speed solar wind streams during low-amplitude days. The CR nucleonic intensity data were subjected to the superposed epoch analysis with respect to the start time of high-speed solar wind streams. It was found that streams of both types produce significant deviations in the CR intensity during low-amplitude anisotropic wave train events. At the onset of such streams the CR intensity reaches its minimum during low-amplitude events and then increases statistically.

Correlation Between Cosmic-Ray Intensity and Upper Air Pressures and Temperatures

1940 ◽  
Vol 57 (4) ◽  
pp. 336-337 ◽  
Author(s):  
Niel F. Beardsley
Keyword(s):  
Cosmic Ray ◽  
Cosmic Ray Intensity

Solar-cycle phenomena in cosmic-ray intensity: Differences between even and odd cycles

1988 ◽  
Vol 42 (3) ◽  
pp. 233-244 ◽  
Author(s):  
H. Mavromichalaki ◽  
E. Marmatsouri ◽  
A. Vassilaki
Keyword(s):  
Solar Cycle ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity ◽  
Odd Cycles

Solar Magnetic Moment and Diurnal Variation in Cosmic-Ray Intensity

1954 ◽  
Vol 93 (3) ◽  
pp. 551-553 ◽  
Author(s):  
J. Firor ◽  
F. Jory ◽  
S. B. Treiman
Keyword(s):  
Diurnal Variation ◽  
Magnetic Moment ◽  
Cosmic Ray ◽  
Cosmic Ray Intensity
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