Change of the main characteristics of cosmic-ray variations and interplanetary space with the cycle of solar activity

1968 ◽  
Vol 46 (10) ◽  
pp. S920-S922 ◽  
Author(s):  
A. I. Kuzmin ◽  
A. M. Altukhov ◽  
G. F. Krymsky ◽  
P. A. Krivoshapkin ◽  
G. V. Skripin ◽  
...  
Keyword(s):  
Solar Activity ◽  
Diurnal Variation ◽  
Interplanetary Space ◽  
Diffusion Mechanism ◽  
Forbush Decrease ◽  
Cosmic Ray ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Activity Levels ◽  
The Mean

Changes of the characteristics of the solar-diurnal variation and Forbush decreases of cosmic rays with the solar activity cycle are analyzed. It is shown that the energy spectrum of the solar-diurnal variation is well described by the Krymsky diffusion mechanism spectrum with b parameters of 59, 40, and 30 BeV for high, middle, and low solar activity levels, respectively. The Forbush-decrease spectrum is described by a power law with exponents −0.8 and −0.6 during high and low solar activity. These changes are interpreted to be the result of a decrease of solar wind velocity and a decrease of the mean strength of the interplanetary magnetic field with a decrease in solar activity.

The change in the energy spectrum of galactic cosmic rays over the 11-year solar activity cycle

1968 ◽  
Vol 46 (10) ◽  
pp. S927-S929
Author(s):  
Yu. Stozhkov ◽  
T. N. Charakhchyan
Keyword(s):  
Diffusion Coefficient ◽  
Solar Activity ◽  
Energy Spectrum ◽  
Cosmic Rays ◽  
Cosmic Ray ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Galactic Cosmic Rays ◽  
Ray Diffusion

The energy spectrum of galactic cosmic rays has been investigated for various periods of the solar activity. In the framework of commonly used ideas about the mechanism of the 11-year variation according to Parker the dependence of the cosmic-ray diffusion coefficient, D, on the particle rigidity, P, was determined. For the form D ≈ vpα the parameter α is found to change during the cycle of the solar activity.[Formula: see text]

Galactic Cosmic Ray Intensity in the Upcoming Minimum of the Solar Activity Cycle

2018 ◽  
Vol 58 (2) ◽  
pp. 169-177 ◽  
Author(s):  
M. B. Krainev ◽  
G. A. Bazilevskaya ◽  
M. S. Kalinin ◽  
A. K. Svirzhevskaya ◽  
N. S. Svirzhevskii
Keyword(s):  
Solar Activity ◽  
Cosmic Ray ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Cosmic Ray Intensity ◽  
Galactic Cosmic Ray

scholarly journals Deriving the solar activity cycle modulation on cosmic ray intensity observed by Nagoya muon detector from October 1970 until December 2012

2016 ◽  
Vol 12 (S328) ◽  
pp. 130-133 ◽  
Author(s):  
Rafael R. S. de Mendonça ◽  
Carlos. R. Braga ◽  
Ezequiel Echer ◽  
Alisson Dal Lago ◽  
Marlos Rockenbach ◽  
...  
Keyword(s):  
Solar Activity ◽  
Cosmic Ray ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Atmospheric Temperature ◽  
Muon Detector ◽  
Natural Phenomena ◽  
Cosmic Ray Intensity ◽  
Temperature Changes ◽  
Muon Intensity

AbstractIt is well known that the cosmic ray intensity observed at the Earth's surface presents an 11 and 22-yr variations associated with the solar activity cycle. However, the observation and analysis of this modulation through ground muon detectors datahave been difficult due to the temperature effect. Furthermore, instrumental changes or temporary problems may difficult the analysis of these variations. In this work, we analyze the cosmic ray intensity observed since October 1970 until December 2012 by the Nagoya muon detector. We show the results obtained after analyzing all discontinuities and gaps present in this data and removing changes not related to natural phenomena. We also show the results found using the mass weighted method for eliminate the influence of atmospheric temperature changes on muon intensity observed at ground. As a preliminary result of our analyses, we show the solar cycle modulation in the muon intensity observed for more than 40 years.

Variations of the cosmic-ray intensity andK p data in the solar-activity cycle no. 19

1974 ◽  
Vol 11 (1) ◽  
pp. 29-32
Author(s):  
O. Filisetti ◽  
G. Lovera ◽  
C. Oldano ◽  
P. G. Tedde
Keyword(s):  
Solar Activity ◽  
Cosmic Ray ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Cosmic Ray Intensity

Distribution of the number of strong earthquakes and the intensity of space rays during the solar activity cycle

2020 ◽  
Author(s):  
Valery L. Yanchukovsky ◽  
◽  
Anastasiya Yu. Belinskaya ◽  
Keyword(s):  
Solar Activity ◽  
Cosmic Rays ◽  
Cosmic Ray ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Strong Earthquakes ◽  
Cosmic Ray Intensity ◽  
Relationship Of ◽  
The Relationship

The relationship of Earth's seismicity with solar activity is investigated using the results of continuous long–term observations of cosmic ray intensity, solar activity and the number of strong earthquakes. Modulation of the flux of cosmic rays is used as information on the level of solar activity, processes on the Sun and interplanetary medium. The distribution of the number of sunspots, the intensity of cosmic rays and the number of strong earthquakes in the solar cycle is presented.

scholarly journals The solar oscillations spectrum and the solar cycle

1988 ◽  
Vol 123 ◽  
pp. 205-209
Author(s):  
A. Jiménez ◽  
P.L. Pallé ◽  
J.C. Pérez ◽  
C. Régulo ◽  
T. Roca Cortés ◽  
...  
Keyword(s):  
Solar Activity ◽  
Power Spectra ◽  
Activity Cycle ◽  
Solar Activity Cycle ◽  
Resonant Scattering ◽  
Velocity Measurements ◽  
Mean Power ◽  
Mode Spectrum ◽  
Yield Information ◽  
The Mean

During the summer seasons of the years 1977 to 1985 daily velocity measurements of solar global oscillations have been obtained using a resonant scattering spectrometer. After calculating the power spectra of the daily residuals, the mean for each season is found. Several discrete frequency intervals are defined in the spectrum which yield information on the characteristics of the oscillations and noise levels. The mean power in these intervals and the cut-off frequency of the p-mode spectrum, determined for each year, are correlated with the solar activity cycle. Furthermore, several series of 13 contiguous days for each year are analyzed. The frequency and amplitude of the p modes of 1 ≤ 3 and 11 ≤ n ≤ 33 are determined and their average for these years is found. The frequency differences between modes of the same degree 1 and between neighbouring modes are found. Their variation over the years is compared with the solar activity cycle.

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