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ON THE RELATION BETWEEN THE INTENSITY DECREASE OF COSMIC-RAYS DURING COSMIC- RAY STORMS AND SOLAR ACTIVITY

H. Takahashi

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Abstract

A statistical study of the relation between the intensity decrease of cosmic rays during a cosmic-ray storm and solar activity is presented. Cosmic- ray meson data obtained at Itabashi during the period from 1948 tc 1956 are used in the study. Results obtained are as follows: arunual means of time differences between the onset of cosmic-ray storms and the time of intensity minimum during the storms have a good correlation with the relative sunspot numbers which are the measure of the solar activity; annual means of decrements of cosmic-ray intensity during cosmic-ray storms have a good correlation with the solar activity. These results are interpreted by a magnetic cloud model. (auth)

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A statistical study of the relation between the intensity decrease of cosmic rays during a cosmic-ray storm and solar activity is presented. Cosmic- ray meson data obtained at Itabashi during the period from 1948 tc 1956 are used in the study. Results obtained are as follows: arunual means of time differences between the onset of cosmic-ray storms and the time of intensity minimum during the storms have a good correlation with the relative sunspot numbers which are the measure of the solar activity; annual means of decrements of cosmic-ray intensity during cosmic-ray storms have a good correlation with the solar activity. These results are interpreted by a magnetic cloud model. (auth)

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Available abstract

A statistical study of the relation between the intensity decrease of cosmic rays during a cosmic-ray storm and solar activity is presented. Cosmic- ray meson data obtained at Itabashi during the period from 1948 tc 1956 are used in the study. Results obtained are as follows: arunual means of time differences between the onset of cosmic-ray storms and the time of intensity minimum during the storms have a good correlation with the relative sunspot numbers which are the measure of the solar activity; annual means of decrements of cosmic-ray intensity during cosmic-ray storms have a good correlation with the solar activity. These results are interpreted by a magnetic cloud model. (auth)

Key concepts: Cosmic ray, Intensity (physics), Physics, Storm, Astrophysics, COSMIC cancer database, Sunspot, Atmospheric sciences

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