Cosmic Ray Intensity Increase on January 28, 1967

During the present solar cycle, which started in October 1964, the ground-based cosmic ray detectors have so far recorded two increases in the intensity of cosmic rays. The first one was observed on July 7,1966 and the other on January 28,1967. Both these events were somewhat unusual in their characteristics.

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Solar rotational period of cosmic rays and solar activity during the maximum phase of solar cycle 24

Physica Scripta ◽

10.1088/1402-4896/ac3c5b ◽

2021 ◽

Author(s):

Prithvi Raj Singh ◽

A. I. Saad Farid ◽

Y. P. Singh ◽

A. K. Singh ◽

Ayman A. Aly

Keyword(s):

Solar Activity ◽

Solar Cycle ◽

Cosmic Rays ◽

Cosmic Ray ◽

R Package ◽

Least Square ◽

Maximum Phase ◽

Cosmic Ray Intensity ◽

Solar Cycle 24 ◽

Cycle 24

Abstract To study the solar rotational oscillation on daily averaged time series of solar activity proxies: sunspot number (SSN), modified coronal index (MCI), solar flare index (FI), and cosmic ray intensity (CRI) are subjected to Lomb/Scargle periodogram, and continuous wavelet transform. For this purpose, we have used data of all the considered parameters from 2012 to 2015, which covers the maximum phase including the polarity reversal period of the solar cycle 24. Both spectral analysis techniques are carried out to study the behavior of 27-days on the time scale of the synodic period and to follow their evolution throughout the epoch. Further, we have used R package RobPer (least square regression) techniques and obtained a significant true period ~27 days is present in this study. It is noted that the ~27-day period of solar activity parameters and cosmic rays is much prominent during the examined period.

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Sudden Increases in Cosmic Ray Intensity

Australian Journal of Physics ◽

10.1071/ph690127 ◽

1969 ◽

Vol 22 (1) ◽

pp. 127

Author(s):

R Anda ◽

B Aparicio ◽

LV Sud ◽

M Zubieta

Keyword(s):

Cosmic Rays ◽

Solar Flare ◽

Cosmic Radiation ◽

Cosmic Ray ◽

Continuous Recording ◽

Intensity Increase ◽

The Sun ◽

Cosmic Ray Intensity

At different times during a period of continuous recording of cosmic rays large increases in the intensity of cosmic radiation have been observed. Most of these are associated with formations on the visible side of the Sun. However, there are two exceptions: Carmichael et al. (1961) believe that the November 20,1960 increase in intensity was due to a solar flare on the reverse side of the Sun, and Sud (1968) has shown that the intensity increase of January 28,1967 also may not be connected with chromospheric eruptions on the visible side of the Sun.

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Two anisotropies of the cosmic-ray particles producing the cosmic-ray diurnal variation

Canadian Journal of Physics ◽

10.1139/p68-361 ◽

1968 ◽

Vol 46 (10) ◽

pp. S828-S830

Author(s):

Masatoshi Kitamura

Keyword(s):

Cosmic Rays ◽

Diurnal Variation ◽

Interplanetary Space ◽

Geomagnetic Latitude ◽

Cosmic Ray ◽

Diurnal Variations ◽

Low Energy ◽

The Other ◽

Energy Spectra ◽

Cosmic Ray Intensity

The solar diurnal variations of both meson and nucleon components of cosmic rays at sea level at geomagnetic latitude 57.5° and geomagnetic longitude 0° are analyzed by the model in which two anisotropies of cosmic-ray particles (one of them, Δj1, from about 20 h L.T. and the other, Δj2, from about 8 h L.T. in interplanetary space) produce the solar diurnal variation of the cosmic-ray intensity on the earth.When the energy spectra of Δj1 and Δj2 are represented by [Formula: see text] and [Formula: see text], respectively, where j0(E) is the normal energy spectrum of the primary cosmic rays, it is shown that the evaluation for m1 = 1, 2, m2 = 0 and the cutoffs at 8 and 10 BeV on the low-energy side of spectra of both Δj1 and Δj2 agree well with the observational results at Deep River.

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CHANGES IN THE INTENSITY LEVEL OF COSMIC RAYS AT FOUR STATIONS IN CANADA

Canadian Journal of Physics ◽

10.1139/p62-140 ◽

1962 ◽

Vol 40 (10) ◽

pp. 1319-1331 ◽

Cited By ~ 10

Author(s):

J. Katzman ◽

D. C. Rose

Keyword(s):

Solar Cycle ◽

Cosmic Rays ◽

Cosmic Ray ◽

Anomalous Behavior ◽

Solar Flux ◽

Intensity Level ◽

Cosmic Ray Intensity ◽

The Mean ◽

Resolute Bay ◽

Magnetic Index

The mean annual intensity of the nucleon and meson components of the cosmic-ray intensity at Ottawa, Churchill, and Sulphur Mountain was at a minimum for the year September 1957 to August 1958 when the mean annual intensity of the 10.7-cm radio solar flux was at a maximum and the annual mean of the interplanetary magnetic index Kp was at its first maximum since the low at the beginning of the present solar cycle. At Resolute Bay the mean annual intensity of the nucleon and meson components was at a minimum for the year July 1959 to June 1960 when the interplanetary magnetic index Kp was at a second maximum. The anomalous behavior at Resolute Bay is attributed to a combination of spectral differences and directional effects.

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The influence of transient solar-wind events on the cosmic-ray intensity modulation

Canadian Journal of Physics ◽

10.1139/p00-044 ◽

2000 ◽

Vol 78 (4) ◽

pp. 293-302 ◽

Cited By ~ 17

Author(s):

I Sabbah

Keyword(s):

Solar Wind ◽

Solar Cycle ◽

Cosmic Rays ◽

High Speed ◽

Cosmic Ray ◽

Power Exponent ◽

Cosmic Ray Intensity ◽

Drift Model ◽

Wind Events ◽

The Imf

We have studied the behavior of cosmic rays observed by three stations during a time of high-speed solar-wind (HSSW) events. These stations cover the median rigidity range 16-164 GV. The influence of the IMF (interplanetary magnetic field) associated with HSSW has also been studied. Our analysis covers the period 1967-1986. Both the cosmic-ray intensity and geomagnetic activity are enhanced by coronal-mass-ejection events. The IMF magnitude and fluctuation are responsible for the depression of cosmic-ray intensity during HSSW events. This depression is rigidity dependent. Low-energy cosmic rays suffer more intensity depression. The rigidity spectrum of the cosmic-ray intensity decreases is dependent upon the phase of the solar cycle. It was steeper during the period 1979-1980. The power exponent is dependent upon the magnetic state of the solar cycle in support of the prediction of the drift model. PACS Nos.: 96.50Ci, 96.40-z

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

Earth Moon and Planets ◽

10.1007/bf00058488 ◽

1988 ◽

Vol 42 (3) ◽

pp. 233-244 ◽

Cited By ~ 13

Author(s):

H. Mavromichalaki ◽

E. Marmatsouri ◽

A. Vassilaki

Keyword(s):

Solar Cycle ◽

Cosmic Ray ◽

Cosmic Ray Intensity ◽

Odd Cycles

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The results of simultaneous measurements of the cosmic-ray intensity over the Antarctic and Arctic

Canadian Journal of Physics ◽

10.1139/p68-359 ◽

1968 ◽

Vol 46 (10) ◽

pp. S823-S824

Author(s):

S. N. Vernov ◽

A. N. Charakhchyan ◽

T. N. Charakhchyan ◽

Yu. J. Stozhkov

Keyword(s):

Cosmic Rays ◽

Temperature Effects ◽

Cosmic Ray ◽

Primary Component ◽

Low Energy ◽

Cosmic Ray Intensity ◽

Simultaneous Measurements ◽

Murmansk Region ◽

The Antarctic

The results of the analysis of data obtained from measurements carried out by means of regular stratospheric launchings of cosmic-ray radiosondes over the Murmansk region and the Antarctic observatory in Mirny in 1963–66 are presented. The problem of the anisotropy of the primary component of low-energy cosmic rays and of temperature effects on the cosmic-ray intensity in the atmosphere are discussed.

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Galactic cosmic ray intensity in the inner and outer heliosphere in the epoch of the solar cycle 24 minimum

Bulletin of the Russian Academy of Sciences Physics ◽

10.3103/s1062873809030186 ◽

2009 ◽

Vol 73 (3) ◽

pp. 340-342

Author(s):

M. B. Krainev ◽

M. S. Kalinin

Keyword(s):

Solar Cycle ◽

Cosmic Ray ◽

Outer Heliosphere ◽

Cosmic Ray Intensity ◽

Solar Cycle 24 ◽

Cycle 24 ◽

Galactic Cosmic Ray

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40. Separation of extra terrestrial variations in cosmic ray intensity and atmospheric effects by differential measurements by G–M telescopes

Symposium - International Astronomical Union ◽

10.1017/s0074180900237960 ◽

1958 ◽

Vol 6 ◽

pp. 386-391

Author(s):

E. A. Brunberg

Keyword(s):

Daily Variation ◽

Cosmic Ray ◽

The Other ◽

Atmospheric Effects ◽

Cosmic Ray Intensity ◽

Difference Of Opinion

The daily variation of cosmic ray intensity can arise partly from atmospheric and partly from non-atmospheric effects. There is at present a difference of opinion whether this latter effect is completely due to extra terrestrial causes or not.The purpose of the present paper is to suggest a method by which the atmospheric effects could be separated from the other variations without any assumptions about the mechanism of the atmospheric influence.

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Cosmic ray spectra in planetary atmospheres

Proceedings of the International Astronomical Union ◽

10.1017/s1743921309029718 ◽

2008 ◽

Vol 4 (S257) ◽

pp. 471-473

Author(s):

M. Buchvarova ◽

P. Velinov

Keyword(s):

Experimental Data ◽

Solar Cycle ◽

Cosmic Rays ◽

Cosmic Ray ◽

Planetary Atmospheres ◽

Galactic Cosmic Rays ◽

Outer Planets ◽

Practical Possibility ◽

The Earth ◽

Theoretical Results

AbstractOur model generalizes the differential D(E) and integral D(>E) spectra of cosmic rays (CR) during the 11-year solar cycle. The empirical model takes into account galactic (GCR) and anomalous cosmic rays (ACR) heliospheric modulation by four coefficients. The calculated integral spectra in the outer planets are on the basis of mean gradients: for GCR – 3%/AU and 7%/AU for anomalous protons. The obtained integral proton spectra are compared with experimental data, the CRÈME96 model for the Earth and theoretical results of 2D stochastic model. The proposed analytical model gives practical possibility for investigation of experimental data from measurements of galactic cosmic rays and their anomalous component.

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